Its true as you breath your heart and lungs go in and out as if you were swinging a door open and shut letting oxgen in and out hope i could help :)
<span>After a long time, a mature community is established and this community does not change unless it is disturbed.</span>
Possibly the Food Chain or the Food Web?
Answer:
A conclusion relates the evidence to the hypothesis and inference is a guess.
Explanation:
Answer:
C
Explanation:
They lost their ability to see
