One difference between parasitism and predation is that parasites:

answer; polycythemia is the correct answer;

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.