Drug designers are made up of scientists and

The correct answer is chemical engineers.

Explanation:

The rational drug design also known as drug design refers to the innovative procedure of discovering novel medicines on the basis of the information of a biological target. The drug is generally a small organic constituent, which prevents or stimulates the activity of a biomolecule like a protein that in turn benefits the patient therapeutically. The drug is designed with the help of teams comprising scientists and several chemical engineers.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).