Which lists important roles of coral reefs? cleaning oil from oceans, protecting beaches, producing oxygen producing oxygen, offering medical benefits to humans, supporting a variety of organisms supporting a variety of organisms, cleaning oil from oceans, producing oxygen offering medical benefits to humans, protecting beaches, supporting a variety of organisms

supporting a variety of organisms, cleaning oil from oceans, producing oxygen
Explanation:
While they do have some medical benefits, those are still being explored and its looking for important roles these seem more important.

supporting a variety of organisms, cleaning oil from oceans, producing oxygen offering medical benefits to humans, protecting

1.) Kinetic energy

2.) K.E = 7500000000 J

Explanation: Given that a 1500 Kg automobile is traveling at a velocity of 100 m/s. 

An object possesses maximum potential energy when it is at rest

And maximum kinetic energy on motion. Since the automobile is travelling with a speed of 100 m/s, its energy is kinetic.

The amount of energy possessed, will be achieved by using formula

K.E = 1/2MV^2

Where

M = 1500kg

To convert it to g, multiply it by 1000

M = 1500 × 1000 = 1500000

V = 100 m/s

K.E = 1/2 × 1500000 × 100^2

K.E = 0.5 × 1500000 × 10000

K.E = 7500000000 J