Frustration is a feeling and aggression is physical
Answer is B.
It should be "Passengers should stay seated until the train comes to a complete stop in the station."
Answer:
Rolling over, crawling, walking, and talking are all considered milestones. The milestones are different for each age range. There is a normal range in which a child may reach each milestone. For example, walking may begin as early as 8 months in some children
Explanation:
B- learning how to make fire was a long struggle for humans