Some organisms living in the high water portion of the intertidal zone cannot survive in the supralittoral zone because
they 6)
a) have planktonic larval forms
b) are sessile
c) cannot tolerate desiccation or drying out
d) cannot tolerate temperature fluctuations
e) cannot tolerate fluctuating salinity

The correct answer is - option A.

Explanation:

Some of the organisms that are living in the high water portion of the inter-tidal zone adapted several characteristics so they can develop the survival in such condition such as planktonic larval forms.

On other hand supra-littoral zone, the area above the high tide line on coast side. Due to planktonic larval forms these organism can not survive such zone.

Thus, the correct answer is - option A.

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