New ocean crust forms at which is a plate boundary

new ocean crust forms at ocean ridges which is a Tectonic plate boundary.

Explanation:

At mid-ocean ridge magma arrives out of the crack, cools and solidifies and builds the new oceanic crust, fresh oceanic crust pushes the old oceanic crust into a ditch in a range known as a subduction zone.

Effects of tectonic plates are following:

what are the choices for the anwser?

the value of the 4 in the hundreds place is 400 while the value of th e 4 in the tens place is 40

400 is way bigger than 40.