Final answer:
Using Newton's Third Law of Motion, the bus windshield experiences the same amount of force as the mosquito which is 63 Newtons.
Step-by-step explanation:
The question relates to the concept of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. In the scenario where a mosquito is smashed on the windshield of a bus, the force experienced by the mosquito is also experienced by the bus windshield but in the opposite direction. Therefore, if the mosquito experiences a force of 63 Newtons, the bus windshield will experience a force of 63 Newtons as well.
Thus, the correct answer to the question is A) 63 Newtons.