Crossword puzzle clue "level of care"

Low-level pollution or high-level protection

Warning sign at a train station's food court? (NOTE: The original sign, without my additions, actually exists. It's in Grand Central Terminal in NYC, on the lower level — the food court level. The sig

Class, level or class level

Management level or theater level

Level of care

Care-___ (where the Care Bears live)

How much I care if I couldn't care less

One level below the majors