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
Yes, because vaccines help prevent diseases whereas antibiotics help cure them. (it’s better to prevent)
Answer B burning fossil fuels in vehicles, power stations, and factories
Explanation:
The first and last sounds most reasonable, but I will go with the last one.
