For this chain-of-thought reasoning and answer, what was the question?
Male dogs use pheromones in urine to mark their territory. Pheromones are a sub-category of semiochemicals. Male dogs use chemicals to mark their territory.
A: (B)
Q: What do dogs use to mark their territory?
Options:
- (A) water
- (B) Chemicals
- (C) layers of fat
- (D) food
- (E) Animal fur
- (F) heat energy
- (G) Scratches
- (H) heat produced