A Natural Balance

The word __________ means "to be arranged or put into groups."

The word __________ means "waste, chemicals, and gases that have a harmful effect."

The word __________ means "the total number of plants and animals in a group."

The word __________ means "a related group of animals or plants."

The word __________ means "at risk of disappearing forever."

The word __________ means "no longer living."

The word __________ means "all of the living and nonliving things that surround a person, animal, or plant."

The word __________ means "against the law."

Fill in the blank with an adjective that describes the noun. Gray wolves travel _____________________ miles a day to hunt for food.

Fill in the blank with an adjective that describes the noun. The jaguar is a _____________________ swimmer.