Answer:
B) Air Resistance
Explanation:
A reaction force is the opposite of an action force, so what is opposing gravity? Momentum certainly isn't in this instance of the apple falling. Thermal velocity isn't, and anti gravity is a hypothetical phenomenon.
<u>B) air resistance</u>
When an falls out of a tree, gravity is acting downwards, and the reaction force which counters it is <u>air resistance</u>.
consistent warm weather
sexual reproduction between two individuals from different continents
True
because it can be a limiting factor in an ecosystem