HELP ASAP! ILL GIVE U BRAINIST ANSWER AND A TY! Need help

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

Which of the following is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow