Gosh, help me please! 5 points.

7 meters per second directly toward the reef

Explanation:

The barracuda swam for 8 seconds, and in 1/4 of that time it swam 14 meters, so:

8•1/4 = 2

The barracuda swam 14 meters in 2 seconds

Now, the velocity is the travelled distance divided by time, so:

14/2 = 7 meters per second

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.