According to the theory of plate tectonics, what drives the motion of the continents?
a.
earth's strong magnetic field
b. moving magma in the mantle
c. strong winds along the equator
d.
volcanic islands in the ocean
e.
changing ocean currents

B.moving magma in the mantle

Explanation:

The continents have moved over millions of years. This is due to global convection in the earth's mantle. Since new material continuously comes out of the mantle below the oceanic crust. Thus, a force is created that pushes the areas occupied by the continents, displacing them.

scientific laws are the result of testing theories and proving them to be facts.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)