A Only one variable changed
Answer:
sorry wish I could help I just don't understand it ??
I am going with x-rays; it is the most visible to the naked eye out of all the choices.
Answer:
The answer is- A). Because it takes tremendous effort to break free from the laws of gravity to exit the Earth's atmosphere.
Explanation:
I really don't have an explanation. Except that I love science and I actually pay attention in my classes.
