Tropical conditions (moist and humid) are required for rubber cultivation. Rainfall needed should be above 200 cms and temperature should be above 25 degrees Celsius to 34 . Major countries producing rubber are Brazil, India. Major regions in India producing rubber are Tamil Nadu, Kerala, Andaman and Nicobar islands, Garo hills of Meghalaya.

PLANNING REGION REFERS TO THE REGIONS WHERE JOB HAS TO BE UNDERTAKEN ON A MACRO BASIS.BUT REGIONAL PLANNING  MEANS PLANNING FOR A PARTICUL REGION ON A MICRO BASIS.

TEA AND COFFEE ESTATES NEED CHEAP LABOUR BECAUSE THE WORKLOAD IS LESS THAN OTHER TYPES OF INDUSTRIES.THEY ARE TREATED AS SEMI-SKILLED,UNSKILLED I.E.CHEAP LABOUR IS AVAILABLE.

Sustainable development can be defined as the development of the present generation by meeting their needs and demand without an eye yo the next generation.

The economic utilization of Africa's rivers can be affected by a variety of factors, including:

1. Water availability: The Niger River in West Africa has experienced decreasing water levels due to drought and increased demand for water resources. This has limited the ability to engage in activities such as irrigation and hydropower generation.

2. Infrastructure: The Congo River in Central Africa has the potential for hydroelectric power generation, but the lack of infrastructure such as dams and transmission lines has limited its development.

3. Climate and weather patterns: The Zambezi River in southern Africa is subject to flooding during the rainy season, which can disrupt transportation and cause damage to infrastructure.

4. Political stability and governance: The Nile River in North Africa has been the subject of political disputes among countries that share the river, making it difficult to develop infrastructure and engage in cooperative management practices.

5. Environmental factors: The Niger Delta in Nigeria, which is fed by the Niger River, has experienced significant pollution due to oil spills and other environmental hazards, limiting its potential for fishing and other economic activities.

1.Greater Himalayas or Himadri: This is the highest and most continuous mountain range in the Himalayas, with peaks rising above 6,000 meters. It is characterized by snow-covered peaks and glaciers and includes some of the world's highest mountains, including Mount Everest, K2, and Kangchenjunga.

2.Lesser Himalayas or Himachal: This is a lower range of mountains located to the south of the Greater Himalayas. It is characterized by densely forested slopes and valleys and includes popular tourist destinations such as Shimla, Mussoorie, and Darjeeling.

3.Outer Himalayas or Siwalik Range: This is a low range of hills located to the south of the Lesser Himalayas. It is characterized by foothills, steep gorges, and plateaus, and includes several wildlife sanctuaries and national parks such as Corbett National Park and Kaziranga National Park.

Natural satellite means satellite made by nature. e.g. moon. Artificial means made by the man. Also, satellite means a body revolving around the other body.

Any two divisions of India can be North India and South India.

We can use diversity index - shanon and Simpsons index

We have to first see what is longitude of both city then take difference of both and this difference is 30 degree. now we know 1degree = 4 minute Therefore 30 degree = 120 minute i.e 2 hours. So answer is 2 hrs