Which sentence could be added after sentence 4 to strengthen the second paragraph of this paper?

(4) without a moment's hesitation, he leaped on the crocodile, which was about to go into a death roll with mrs. pethrick under the water.
question 1 options:

a death roll is when a crocodile pulls its prey under the water to drown and confuse it.

this was a stupid thing to do because he could have been killed.

mrs. pethrick was probably really scared.

mr. pethrick wasn’t sure if the crocodile was going to eat his wife.