For a reader to blank two more things, the reader must consider how the things are different

For comparing two or more things the reader must understand how the things are different.

Explanation:

When we want to compare two things we need to have proper knowledge regarding it , that is we should come across all the facts of two things, that will help us to easily compare it. While reading we should understand both the things properly because proper understanding of both the thing is very important while comparing. When we are comparing or contrasting two things, it is very important that we should observe it properly so that we can find the difference.

hot and dry

i need 20 things so this was just randomly added. hot and dry is the answer