Which Statement Is a Basic Lesson from Nature

question 1

Multiple Choice

Which statement is a basic lesson from nature? 

• A) Sunlight is the source of energy that sustains ecosystems. 
• B) Energy is not required to maintain energy flow and recycle chemicals. 
• C) There are no limits to population growth. 
• D) Populations of organisms, including humans, are kept in check by natural means.

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Definitions:

Isn't

Contraction of "is not," primarily used in English to denote negation.

Squirts

Small, quick streams or jets of liquid ejected from something.

Conditioned

A state or behavior that results from a process of training or habituation.

Snow Tank

A specialized armored vehicle designed for operations in snowy and icy conditions.