How are conditions for life in a sandy beach's intertidal zone different from those in its subtidal zone?

A. The intertidal zone has consistent water depth, while the subtidal zone experiences water level fluctuations.

B. The intertidal zone is permanently submerged, while the subtidal zone is exposed to air during low tide.

C. The intertidal zone has more stable temperature conditions, while the subtidal zone experiences extreme temperature fluctuations.

D. The intertidal zone is exposed to air and wave action, while the subtidal zone is consistently submerged.

The intertidal zone of a sandy beach is exposed to air and wave action at low tide and submerged at high tide, featuring harsh conditions. In contrast, the subtidal zone is consistently submerged, experiencing a relatively stable environment, accommodating a greater diversity of marine life.

Explanation:

The conditions for life in a sandy beach's intertidal zone and subtidal zone are different in several ways. The intertidal zone is the area that is exposed to air and wave action at low tide and submerged at high tide. On the other hand, the subtidal zone is the area that is consistently submerged, even at low tide.

Option d) is correct. The intertidal zone is exposed to the drying out effect of the sun and the intense wave action which subjects organisms living there to harsher conditions. In contrast, the subtidal zone has a relatively stable environment since it does not get exposed to the atmosphere, which makes it more hospitable to a greater diversity of marine life.

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