Answer:
The valves actually make things a lot more comfortable because they make the mask a lot more breathable
Explanation:
D heavy drinking during a pregnancy
Answer: tracking actual calories burned during a workout
Explanation:
The correct answer is
<span>B. red shift of distant galaxies.
Basically, the farther it is the more space there is to stretch and expand. This means that the further away the galaxy is the further away from us it is moving. Scientists observe this through observing red shifts which and all their observations point out to the idea that the universe is constantly expanding.</span>
<span />
