Q: Hummingbirds are what they are today as a necessary consequence of their relationship to what?
Options:
- (A) a feeder
- (B) humans
- (C) bees
- (D) survival
- (E) animals
- (F) Plants
- (G) Earth
- (H) weeds
A: So, my chain of thought: Some birds are pollinators that co-evolved with plants. Hummingbirds are the most common bird pollinators. Hummingbirds co-evolved with plants. The answer is (F).

Q: Earthworm bodies are:
Options:
- (A) fertile
- (B) segmented
- (C) migrate
- (D) allow growth
- (E) revolving
- (F) more abundant
- (G) Loose
- (H) Absorb light
A: So, my chain of thought: Annelids are worms such as the familiar earthworm. Annelids have bodies that are segmented. The familiar earthworm has a segmented body. The answer is (B).

Q: Some invertebrates may have which feature?
Options:
- (A) invertebrate
- (B) fat
- (C) gills
- (D) exception
- (E) three
- (F) mollusk
- (G) complex
- (H) shell
A:
So, my chain of thought: Most mollusks have shells. Mollusks are invertebrates and are no exception. Some invertebrates have shells. The answer is (H).