AP English Language

The weak thesis statement for an essay on climate change is: D."Climate change is happening."

Explanation:

This statement is too vague and lacks a clear argument or direction. While it states a fact, it doesn't specify the scope, causes, or effects of climate change, nor does it suggest a particular stance or position for the essay.

The other options are stronger because:

A."Climate change is a pressing global issue that requires immediate action to mitigate its effects on the environment and human health."

This is a strong thesis as it clearly states the urgency of the issue and identifies the need for action, providing a focused direction for the essay.