Question

for a reader to two or more things, the reader must consider how the things are different.

Explanation:

The sentence is about a reading skill where one considers the differences between two or more things. The word "contrast" means to compare by showing differences, which fits the context as the reader needs to look at how the things are different. Other possible words like "compare" can include similarities, but here the focus is on differences, so "contrast" is more appropriate.

Answer:

contrast