Life-forms that existed during the paleozoic era included

a. fish

b. trilobites

c. reptiles

d. all of the above

D all of the above is the correct answer. Hope this helps. <333

I believe that the correct answer is d. All of the above

hope this helps

have a good day

C.J

a "theory" a suggestion that is not 100 % accurate, or a figure. some people say its a theory because they of all the passed theory's about one subject. it depends sometimes theory might be accurate and sometimes they are.

the answer is c.) there is a warm front in region a and a stationary front in region b.