Question

1. what is another characteristic of a compound classified as d?

class of compound\tcharacteristic
a\thas glycerol as a building block
b\tcontains both acid groups and amino acids
c\tformed from subunits containing a nitrogenous base, a phosphate, and ribose
d\tincludes sugars and starches

Explanation:

Class D includes sugars and starches (carbohydrates) which are used primarily as fuel.

Answer:

Used primarily as fuel