The third one the second one and the first one
Because they are consumed by other animals to obtain their energy
Http://www.lcps.org/cms/lib4/va01000195/centricity/domain/4153/study%20guide%20-%20geography%20unit%201%20answer%20key.pdf
Answer:
it is a good way
Explanation:
It is a good way to gather demographic information because it's very accurate. Censucount.org says that "The Census Bureau reported a net national overcount of 0.01% in 2010" which means they are only off by a little, but still effective. THe demographic information is then used to decide where to distribute the funds and taxes for schools, public areas, supermarkets, etc.
