C is the awnser….i’m just guessing bro but c seems good
It is TRUE that coral reefs form when a<span> structure of calcite skeletons built up by coral animals in warm, shallow ocean water. </span>To form their skeletons, coral animals absorb the element calcium from the ocean water. The calcium is then combined with carbon and oxygen to form calcite (calcite is a mineral). When coral animals die, their skeletons remain. More corals build on top of them, gradually forming a coral reef.
Answer:
The answer is D.
Thigmotropism is the way that a plant grows in response to touch.
The limb buds appears in the in the fourth week of gestation and the
upper limb is visible on day 24. Initial elongation of the bud forms around 33
days and continues to elongate until seven weeks.
