If forces that oppose motion cause the speed of an object to decrease, then if a force that opposes motion is applied to an object, what will happen to its speed?

Answer choices:
- Plant growth is reduced
 - It will decrease
 - It will reach nano-speed
 - It will stay the same
 - kinetic energy
 - It will increase
 - Under 32 degrees
 - supersonic

 

  It will decrease        