SHe is curious about nature and has a since of wonder in life.
Answer:
A. When Diego hesitates to confront Ian, it suggests that he still fears his old enemy.
Explanation:
The interpretation is given when the speaker claims that he ( Diego ) has some fears and these are caused by an old friend of his, Ian. This interpretation is reinforced by the verb " suggests ".The evidence is present when the speaker describes Diego's attitude towards Ian: he is not determined to face Ian .
Explanation:
polio vaccine was discovered by jonas saulk, 1953. order of events he had to follow / Saulk introduced the 1st vaccine with dead polio virus injected in humans, in 1953. 1st 2 introduce dead virus into humans, proved to be a substantial tool for vaccination of children and adults. proven to work, we use this vaccine today...
