AP English Language

The thesis statement that is too broad and needs refining is: B."Pollution affects the environment."

Explanation:

This thesis is too broad because it makes a general statement about the effects of pollution without specifying which types of pollution, which aspects of the environment are affected, or how pollution affects the environment. It lacks focus and direction, and it would need to be more specific in order to be a strong thesis.

Why the other options are more focused:

A."The use of renewable energy sources can help reduce global warming."

This thesis is clear and focused, addressing a specific solution (renewable energy) and its effect on a specific issue (global warming).

C."School uniforms can help improve s...