Sound is a type of mechanical signal in our environments. We use our sense of hearings to receive this signal type. How can signals from our environment affect out circulatory system?

Explanation:

The environmental noise and sound signals are associated with an increased incidence of arterial hypertensiont,heart failure and stroke

answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.

i'd say that the moon rock is about 2.2 billion years old.