Which correctly lists the 3 types of radiation from least damaging to most

damaging?

alpha < beta < gamma

alpha < gamma < beta

gamma < beta < alpha

beta < gamma < alpha

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.

the answer to this question is 3.