They produce pockets (eggs) for fertilization and they produce the reproductive hormones, oestrogen and progesterone.
Choices 1, 2, and 3 all emit carbon dioxide, not enough to destroy the planet, but they still can cause it over a large amount of time, due to Carbon Dioxide being a greenhouse gas. Therefore, the answer is 4. Bicycles do NOT emit any carbon dioxide at all.
Answer:
question 1 i believe is a super volcano
question 2 the answer is B
i dont know the last 2 sorry
Explanation:
Potential energy is stored energy!!!!