Plants need CARBON DIOXIDE to survive.
True
False

I think false

As an autotroph, plants require CO2 in order to live and grow. Photosynthesis is a process that requires light, water (H2O), and carbon dioxide (CO2). ... Once the process is done, the plant releases oxygen. Without CO2, life as we know it on planet Earth, could not continue.

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.