The answer is A because if you want a reliable source of scientific information you should go to an actual scientist at a scientific conference.
Breakwaters protect an anchorage from the effects of weather and longshore drift, while jetties protect against erosion, by keeping the waves from sweeping the sand away. Difference, they both protect against different things.
Cyclins are a family of proteins that <u>[</u><u> </u><u>A </u><u>]</u><u> </u><u>Regulate</u><u> the</u><u> </u><u>cell </u><u>cycle</u>
Answer:
diseases because they sometimed kill off some of the human and also poverty