In order to make sure it is possible to clean the floors under shelving units in food establishments, the shelves must be at least above the floor

6 inches

Explanation:

There are food and safety guidelines that is made available for the people to keep the food clean and safe for eating.

The shelves must be made at a height of 6 inches from the ground so that the  space that is under the shelves can be cleaned properly.

This much space is the minimum which has to be there to get it cleaned properly. This will ensure fresh food and will not be infected by bacteria by contamination.

which ever one is showing doing the same exercise in time intervals such as 30 seconds or a minute several times.

answer; (false);