Which characteristic is a property of molecular substances?
A. good heat conductivity
B. good electrical conductivity
C. low melting point
D. high melting point

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

d.) circle motion requires a force to give it a centripetal acceleration.

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

i believe the answer is true.