What do you think would happen if there was no homeostasis?

  life, as we know it, would not exist

Explanation:

If living systems were inherently unstable, life could not exist in the form we know. Any small change would ultimately result in an extreme response. Even the conditions on the planet that currently support life would eventually settle at an extreme from which no further change would be possible.

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(Fortunately, the laws of physics and chemistry virtually guarantee that homeostasis is a possible, even likely, condition.)

The answer is B for edgenutiy