Question

which of the following methods for measuring populations utilizes recording signs of animals, such as droppings, tracks, nest counts, etc? measurement parameters rate of increase index population size census

Explanation:

This method estimates population size by using indirect signs (like droppings, tracks) as an index of animal presence and abundance, rather than counting individuals directly. The other options do not match: measurement parameters are variables studied, rate of increase is population growth, and census is direct counting.

Answer:

index population size