Identify the case in which disparate treatment is considered legal.

A legal case would be having female workers only as cleaners of female restrooms and bathrooms. This is done to prevent men from entering female only bathrooms because they might be pervs or cause discomfort to those who go to the bathroom. It is legal therefore to employ only ladies for that position.

Scientists think convection currents are what cause earth's plates to move. a convection current is caused by differences in  temperature.  mantle  material close to earth's core is very hot.  mantle  material near the lithosphere is cooler.