All living things respond in certain ways to ______ in their environment.

A.. Changes
B.. Respond
C.. React

Changes

A.. Changes

Example:
When the temperature drops, we respond by shivering and saying, "I'm cold!"

c:REACT

A. Changes

The correct answer is C - React.

To arrive at this answer, we can first analyze the question. It states that "all living things respond in certain ways to ______ in their environment." This suggests that the missing word is related to how living things react to something in their surroundings.

Next, we can look at the options provided. A - Changes and B - Respond seems like plausible options, but upon closer inspection, they are not the best fit. Option A - Changes is too general, as living things respond specifically to certain stimuli or events in their environment, rather than just any change. Option B - Respond is too vague, as it does not provide any context or specify how living things respond.

Moving on, option C - React is the most appropriate answer. It encapsulates the concept of living things responding to stimuli or events in their environment. The word "react" implies a specific and purposeful response to external conditions, which accurately describes the behavior of living organisms.

Therefore, the correct answer is C - React.