Question

our dog heard someone outside our door and began to ______.
1 chatter
2 cheer
3 growl
4 spark

Explanation:

To solve this, we analyze each option:

• "chatter" means to talk rapidly, which a dog doesn't do.
• "cheer" is to express joy, not typical for a dog hearing someone outside.
• "growl" is a low, threatening sound dogs make when alert/protective, fitting the context of a dog hearing someone at the door.
• "spark" means to ignite or start, irrelevant here.

Answer:

1. growl