Plz help! Which evidence originally supported Hess’s idea of seafloor spreading in 1968?

A) Younger rocks are closer to mid-ocean ridges.
B) The destruction of crust occurs at deep-sea trenches.
C) Oceanic rocks are pillow-shaped when formed.
D) Rocks across the ocean floor have alternating magnetic stripes.

The evidence that originally supported Hess's idea of seafloor spreading was that the younger rocks are closer to mid-ocean ridges.

Explanation:

A is correct because Hess noticed that the rocks that are closer to the mid-ocean ridges are younger, and as their distance from the mid-ocean ridge increased, their age increased as well, thus giving him a clue that the seafloor is spreading.

B is not correct because Hess never managed to examine the deep-sea trenches.

C is not correct because Hess didn't have the means to be that close (in water) to a mid-ocean ridge where the new crust is formed so that he can witness it, and this was mainly due to the lack of proper equipment.

D is not correct because magnetic stripes indicate the positions of the poles throughout the geological past.

the wrong statement is - c. a desert had more biodiversity than a marsh.

the deserts are one of the places of the planet where there's the least biodiversity. the reasons for that are the climate and the lack of food sources, which hampers both the number of the species that can survive in it, and the number of the individuals in the species itself.

the marshes, on the other hand, are places where there's perfect conditions for lots of organisms to thrive. the temperature is moderate and nice, the amount of water and the food sources are on a high level, so there's an abundance of both plant and animal life in them.