- which: used for non human objects or parts of other animals, not people.
- where: is a location. Where is my watch?
- Whose: a possessive. It is always in front of a noun. Whose pen is that?
- Who: is the subject form for who/whom.
1: which or that is used for rocks and nonliving objects. It is the answer here.
2: where the beach was where? underwater.
3: refers to people who is the answer.
4: findings belong to whose. The answer is whose.
5. which are brightly colored. Refers to feathers.
6. who is the answer. The scientists who refers to people (scientists).
7. whose a possessive animals possessing homes.
8 where (the asteriod landed).
which: 1 and 5
where:2 and 8
who: 3 and 6
whose: 4 and 7
