Question

sleep hygiene is _______.
seeing a sleep doctor to understand clean sleeping
making sure your sheets are clean
practicing good habits to make sure youre rested and alert
brushing your teeth before bed

Explanation:

Sleep hygiene refers to a set of consistent habits and practices that promote quality sleep, which in turn leads to feeling rested and alert during waking hours. The other options are either narrow, unrelated actions or incorrect framing of the concept.

Answer:

practicing good habits to make sure you're rested and alert