Question

List four ways of determining population size??

Answer 1

1) sampling

Answer 2

Okay, so I forgot the name of the method, but you can do population sampling.
Sometimes, you can determine life history though the usage of hordes, and basing your guess on population size based on that.
Check google, or your textbook, they'd be of more use.

Answer 3

okay thanks anyway L)

Answer 4

Use a quadrat