What is cut off from the open sea coral reefs or sandbars a watershed b lagoon c reef or d atoll . also this is a science question but i could not find science on here so i chose physics

Option (B)

Explanation:

A lagoon is defined as a shallow water body that is often separated by a larger water body such as oceans by a coral reef or sandbars. This lagoons are of 2 types, namely the coastal lagoon and the atoll lagoon.

(1) Coastal lagoon-This type of lagoons are protected by sandbars or barrier islands. They usually form along coastal areas with small range in the tidal. They are shallow type of basin that are present near the gradually eroding shore.

(2)Atoll lagoon- They are almost similar to the coastal lagoons, but they are mostly protected by the coral reefs. These are commonly found in the oceans of tropical regions.

Thus, the correct answer is option (B).

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.