500
Give your evidence to the 400 question. See below.
Fish are very diverse creatures. Some fish swim with the fins only going to the left. This helps them turn well. Some fish are large, which helps them catch other prey. Again, fish area all different.
Which are the most important details?
A. Some fish swim with their fins going left.
B. Some fish are large.
C. This helps them turn well.
D. Fish are different.
E. Both A and B
What is A and B are details, not topic sentences/main ideas. They are also not explanations, they are details.