The second one is correct
Explanation:
Because Aslan is downcast, everyone feels depressed as they eat dinner and go to sleep at their new campsite. Susan and Lucy can't fall asleep and begin talking. They both feel that something is wrong with Aslan and that something bad is going to happen soon. They decide to go look for him.
The boy who ran for class president is the football captain.
The correct pronoun is who.
The pronoun which is used for objects, not people.
The person wonders if there is a point when humans know everything, or if there is a point where humans are too full of knowledge to learn anything else.
