Question

read the passage and look at the picture.
the aden ridge began to form millions of years ago as the somalian plate and the arabian plate moved away from each other. the plates are slowly moving apart at a rate of about 2 centimeters per year. on the map, the ridge is shown in the gulf of aden, between the countries of somalia and yemen.
complete the sentence.
the aden ridge formed at a ______ boundary.
convergent divergent transform

Explanation:

Divergent plate boundaries occur when tectonic plates move away from each other, which creates new crust and often forms underwater ridges. The passage states the Aden Ridge formed as the Arabian and Somalian Plates moved apart, matching the definition of a divergent boundary.

Answer:

divergent