Can someone Please!! Help me on this question Answer choices:

A - Evolution is an example of the major mechanism by which natural selection occurs.

B - natural selection is an example of the major mechanisms by which evolution occurs.

C. Natural selection occurs separately and without any involvement with the process of evolution.

D. Evolution occurs separately and without any involvement with the process of natural selection

Please help.!

Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds

A consumer spends ₹;60 on a good priced at ₹;5 per unit. When price falls by 20%,the consumer continues to spend ₹;60 on the good. Calculate price elasticity of Demand. The correct answer is-

well the answer is 2!