HELP ME PLZ Which phrase describes short-term environmental changes?
occur over thousands to millions of years
O occur over minutes to hundreds of years
O have little to no impact on organisms
are slow-building and offer advanced warning

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.

a) the particles of the chair are strongly held together.