Available choices:
[A]. sweating
[B]. attract females
[C]. Release energy
[D]. repels females
[E]. attract enemies
[F]. attract males
[G]. adding heat
[H]. dangerous

Fact 1: Male dogs use pheromones in urine to mark their territory. Fact 2: Males produce 'pheromones' to attract females. Given the two facts above, what does the substance that male dogs have in urine to mark their territory do?
Answer:
[B].