While listening styles differ, everyone can use the same listening strategies to become more effective listeners.

Let's think about one listening strategy that would help everyone become a more effective listener:
-do not interrupt the speaker or correct their grammatical mistakes

It is true that this rule will make everyone a more effective listener! So the entire statement is true as well.

The equator.

Explanation: The equator (0° latitude) divides the globe into Northern and Southern hemispheres.