Q: What burrows help aerate soil, which is also good for plants?
Options:
- (A) leaves
- (B) adding heat
- (C) Exfoliation
- (D) good
- (E) roots
- (F) wind
- (G) rocks
- (H) annelids
A: So, my chain of thought: Earthworm burrows help aerate soil, which is also good for plants. Earthworms Earthworms are in the phylum Annelids. Annelid burrows help aerate soil, which is also good for plants. The answer is (H).

Q: Energy enters what in the form of sunlight or chemical compounds.
Options:
- (A) biomes
- (B) fire
- (C) light
- (D) Energy.
- (E) Energy
- (F) LEDs
- (G) propagate
- (H) photons
A: So, my chain of thought: Energy enters ecosystems in the form of sunlight or chemical compounds. Biomes are global ecosystems. Energy enters biomes in the form of sunlight or chemical compounds. The answer is (A).

Q: Mature sponges produce what?
Options:
- (A) eggs and sperm
- (B) live young
- (C) just sperm
- (D) Organic compounds
- (E) Chemical energy
- (F) just eggs
- (G) heat energy
- (H) gastropod shells
A:
So, my chain of thought: Adult sponges produce eggs and sperm. Adults are sexually mature. Mature sponges produce eggs and sperm. The answer is (A).