Question

B. Answer in one word.
1. The type of energy harvested from coal
2. The process of the development of industries
3. The sources of energy that do not get exhausted
4. The ultimate source of energy​

Answer 1

Explanation:

Coal can be extracted from the earth either by surface mining or underground mining. Once coal has been extracted, it can be used directly (for heating and industrial processes) or to fuel power plants for electricity. If coal is less than 61 meters (200 feet) underground, it can be extracted through surface mining

Industrial development generally begins in response to domestic demand generated in the primary sector, which also provides inves- tible funds for manufacturing industries. ... More often than not, the surplus generated in the primary sector is associated with export expansion.

Hydro energy or water energy is renewable source of electric energy, which will never get exhausted, since water is available in plenty. Solar energy is also known as light energy, which is obtained from the sun and it will never get exhausted

The Sun is an infinite (at least in terms of human time scales) and renewable source of energy which is also by far the most important source of energy for us. ...