Answer:
Orcas, also known as killer whales, are one of the ocean's most powerful
predators. They may eat about 500 pounds of food a day
Explanation:
Orcas, also known as killer whales, are one of the ocean's most powerful
predators, they may eat about 500 pounds of food a day.
^This is a run-on sentence, so it is ruled out
Orcas also known as killer whales. They are one of the ocean's most powerful
predators and they may eat about 500 pounds of food a day.
^ This is a sentence fragment
Orcas, also known as killer whales, are one of the ocean's most powerful
predators they may eat about 500 pounds of food, a day.
^There is no need for a comma between food and a
