1. What does the author think about wetlands? How do you know?

Explanation:

Wetlands are among the most productive ecosystems in the world, comparable to rain forests and coral reefs. ... Wetlands can be thought of as "biological supermarkets." They provide great volumes of food that attract many animal species. These animals use wetlands for part of or all of their life-cycle.

multiplying and dividing the two decimals and the eqations by the same number of the overalls

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.