The correct answer is B: when a historian is trying to understand the past by some historical figure's eyes, he/she is trying to identify which factors that person could have taken into account when deciding what to do in their time.
However, the first option (A) is also right: in order to understand what influenced a historical figure, the historian needs to know how that person thought, and felt, and understood the world around her/him.
For example: if a historian is analyzing a historical figure who was religious, he/she has to remember that that person's actions were probably influenced by his/her beliefs. Knowing someone was religious makes it necessary to understand religion as an influencing factor in that person's actions.
In the 80’s many people refused to live there because of the weather conditions. It was too hot for the crops to survive, so in turn they would have no food to eat.
The great ancient civilizations flourished around river valleys because the rivers produce rich fertile soil and a supply of water for irrigation of crops and human consumption. This allows for the agricultural production to be greater and it can sustain more people.
