Which evidence originally supported Hess's idea of seafloor spreading in 1968? Younger rocks are closer to mid-ocean ridges.
The destruction of crust occurs at deep-sea trenches.
O Oceanic rocks are pillow-shaped when formed.
O Rocks across the ocean floor have alternating magnetic stripes.

A. Younger rocks are closer to Mid-ocean ridges

Explanation:

My notes say it A: Younger rocks are closer to mid-ocean ridges.

Explanation:

This was discovered in the 1960's And proves that the new rock formed is pushing the sea floor.

My notes:

In the 1960s, scientists discovered that the mid-ocean ridges were a source of new crust material.

They went deep under sea and down to the mid-ocean ridge in a submarine called Alvin.

Mk I just did the test on Edge 2020 and got it right along with all the other answers so I got a 100%.

Your welcome