Answer the following question, with explanation first.
Bob pulled a rock out of the ground. He wanted to examine the thing because he was into geology.  He was also into waterskiing.  He had many what?\nOptions:\n- talents\n- complex\n- interesting\n- learn more about\n- interests

interests
Bob had many interests.

Geology and waterskiing are two different fields in which he was interested.

.

So, the answer is interests