Question

this is released by the weathering of rocks. *
phosphorus
water
nitrogen
carbon

Explanation:

In the phosphorus cycle, phosphorus is released into the environment through the weathering of rocks. Water is part of the water cycle, nitrogen has its own nitrogen cycle (with processes like nitrogen fixation, not primarily released from rock weathering in the way described here), and carbon has the carbon cycle (where carbon is released from sources like respiration, combustion, not mainly rock weathering as the key initial release step in its cycle compared to phosphorus).

Answer:

Phosphorus