Answer: unawareness, he doesn't care.
Explanation: Instead of helping her, he just lets her sit on the floor and he acts as if he doesn't notice.
If you have rights; those rights have to be protected somehow, and this might take work. This work can be another person's duty (for example, a policeman should protect your safety). If we only had rights, there would be no way of enforcing them: in this way duties can be seen as a way of ensuring that our, and others', rights are respected. They go together, as two sides of a coin.
Answer:
Decrease because it is killing the aphids therefore decreasing the population of aphids
Everebody because we all are equal
