Select the option that can be used as a one-word substitute for the given group of words.

Taking heed or care; being conscious

Mindful

The option that can be used as a one-word substitute for "taking heed or care; being conscious" is mindful.

• Mindful means being aware of and attentive to what is happening in the present moment.
• Mindless means not paying attention or being unaware of what is happening.
• Mindset is a set of assumptions, beliefs, and attitudes that guide how we think and behave.
• Mind-read is to try to understand what someone else is thinking or feeling without them actually telling you.

Mindful is the most appropriate word for the given group of words because it specifically refers to being aware of and attentive to what is happening in the present moment. It is derived from the Old English word gemyndig, meaning "remembering."