Answer:
It cancels recoil.
Explanation:
For each action there is an equal an opposite reaction.
The principle of conservation of momentum tell us that if a single spore were ejected the fern would suffer a recoil from it. This recoil would take energy and speed from the spore. But if they are ejected in pairs the recoil is canceled and all the energy is transferred to the spores resulting in higher speeds.
Hmmm...maybe it would be because since you're staying still then things appear to go by quickly.
Answer:
D. demand; increased
Explanation:
Demand is how much people want it.
