Earthquakes often occur along as a result of the build up of stress a: volcanoes b: ridges c: subduction d: plate boundaries

Earthquakes often occur along plate boundaries, as a result of the build up of stress along those boundaries.

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

don't remove my answer im trying my best to answer them

explanation:

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.