Well if it was traveling for an hour then the answer is 8 miles.
High amplitude sound would be music, radio, or earthquakes.
Low amplitude sound would be a breeze or wind.
The answer is D. Unconditioned
The response to an unconditioned stimulus that occurs naturally without learning and involuntarily triggers reaction is known as an unconditioned response. For example, you smell your favorite food while being cook may make you instantly feel hungry.
An organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.