1) which type of map best shows differences in elevation?

a. mercator

b. robinson

c. gnomonic

d. topographic

2) what receives radio waves from space objects such as quasars?

a. gps equipment

b. landsat satellites

c. vlbi equipment

d. navigation satellites

1D - elevation is shown with shading or contour lines. 

1. Topographic map is the type of map that best shows differences in elevation. The correct option among all the options that are given in the question is the last option or option "D".

2. VLBI equipment is the equipment that receives radio waves from space objects such as quasars. The correct option among the options given is option "C".

Bees shall never produce milk no matter what but this is a joke and the answer is a breast that produces milk.