Answer:
The most effective experimental approach to assess the effects of elephant impact on vegetation is to assess plant responses under differences in elephant density. It is important that other factors, such as soils or habitat structure are held constant so that the only factor which varies is elephant density.
Explanation:
source: Studying Elephants icun.org
This is baby stuff tbh. But it is A. You need water to live. Food to live. Air obviously and a shelter
An increase in insulating atmospheric gasses (e.g. carbon dioxide)
The particles that surround the neutrons are ELECTRONS
