It might mean that his accomplishments were made possible by building off the knowledge of scientists that went before him.
Answer:
They started to help prevent malaria, as well as typhus and other infectious diseases, from spreading across the U.S
Explanation:
There is no passage, it's ok if you forgot.
No there shouldn't be an age limit
Answer:
brave and valorous
Explanation:
According to Steinbeck, the bod of a soldier doesn't let them remember the extreme of emotions experienced in a battle. Steinback explains that a soldier does not remember what happened at the war. More worse the battle and more do they forget about it. During a war, the soldiers lose the instinct for self-preservation and hence they perform heroic deeds in battle.
Hence, when soldiers do not talk about their battle experiences they are considered to be brave and valorous.