Answer:
A) Grandma enjoys listening to the thunder roar.
Explanation:
Saying that the thunder roared is an example of personification. It makes it seem like it is alive. Saying that it crashed or boomed would not have that effect.
Seismic waves travel at different speeds depending on what subsurface material it is traveling through, so scientists monitor the time it takes for these waves to reach their equipment to determine the subsurface material densities.
