Question

question 10/28
which two of the following is most support continental drift? (mya = million years ago)
a the seafloor is spreading.
b the ice caps are shrinking.
c the ring of fire is dormant.
d the earths surface is slowly and consta

Explanation:

• Option A: Seafloor spreading provides a mechanism for how continents can move, as new crust forms at mid-ocean ridges and pushes older crust (and attached continents) apart, directly supporting continental drift.
• Option D (completed as "The Earth's surface is slowly and constantly moving"): Continental drift is the theory that Earth's continents have moved over geologic time, so observation of the Earth's surface moving slowly and constantly aligns with this core idea.
• Option B: Ice cap shrinkage is related to current climate change, not the historical movement of continents.
• Option C: The Ring of Fire is an active zone of tectonic activity, not dormant, and its activity relates to plate boundaries but does not directly support continental drift as strongly as the other two.

Answer:

A. The seafloor is spreading.
D. The Earth’s surface is slowly and constantly moving.