The correct answer is actin. Microfilaments are made form a ball-shaped protein called actin. These actins are globular proteins who are the ones responsible for the formation of microfilaments. It is mostly found in the eukaryotic cells.
According to Newton's first law, an object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Any passengers in the car will also be decelerated to rest if they are strapped to the car by seat belts. Also if a car was going straight but another car (unbalanced force) bumps into it causing the motion of the car to change.
I believe the answer is delta.
I know for a fact mushrooms and molds id assume mildew as well but not sure about the other 2 hope this helps!