Question 1: B. Application

Question 2: B. Infinity

Question 3: Okay maybe this is where it gets tricky.

Your sentence indicates that the man was driving and that the traffic light turned red and so he stopped...

BUT your question is WHO stopped the man...

The traffic light is a "what" because it's a "thing". The zebra is also a "what".

The ONLY correct answer if I am to respond to "WHO" would be the police.

Therefore my answer to Question 3: is Police

Upvoted and followed! :-)