In order to increase the rate of a reaction, heat may not always be the best option. describe why someone might choose to add a catalyst instead of heat.

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

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.