B. When the sun and the moon are aligned, their combined gravitational force attracts the water, causing super high tides on one side of the planet, and super low tides on the opposite side.
Answer:
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

f= force
m=mass
a=acceleration
Explanation:
examples:
riding your bicycle
•your bicycle is the mass, your leg pushing in pedals of your bicycle is the force
pushing a box
•the box is the mass, you are pushing the box
setting a pencil down in a table
•the pencil is the mass, you are puting the pencil down
Sadly, we're forced to answer the question without the benefit of the
list of choices, which, for some reason, you decided not to let us see.
Index of refraction of a substance =
(speed of light in vacuum) / (speed of light in the substance).
Any number greater than ' 1 ' can be an index of refraction. A number
less than ' 1 ' can't be . . . that would be saying that the speed of light
in this substance is greater than the speed of light in vacuum.