How do dragonflies and fish affect the mosquito population in lakes, ponds and streams?

a. they eat mosquitos, which decreases the mosquito population.
b. they eat mosquitos, which encourages female mosquitos to lay eggs.
c. they eat other insects, leaving the mosquito population to thrive.
d. they do not eat mosquitos, so they have no effect on the population.

How are the two arguments made in the passages different? a. the first passage claims that pets in class will children with health problems; the second passage says pets will make some health problems worse. b. the first passage claims that students’ nervousness will decrease around pets; the second says that students’ nervousness will increase around pets. c. the first passage claims that pets will make the teacher’s work easier by keeping students busy; the second passage says pets will make the teacher’s work harder. d. the first passage claims that pets in school will be good for kids’ mental health; the second passage says pets will be bad for kids’ mental health.