Can u help me figure out what this is ??? or at least help me out like with one whole part

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 would say b

explanation:

but i think i would need more information than that

b) nuclear ive learned that in a pedtrodic table

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este