Final answer:
The speed of sound through a medium depends on temperature and pressure.
Step-by-step explanation:
The speed of sound through a medium may be assumed to depend on several factors. One important factor is the temperature of the medium. As the temperature increases, the speed of sound also increases. For example, sound travels faster in warmer air compared to colder air.
Another factor that affects the speed of sound is the density of the medium. Generally, sound travels faster in denser materials. For instance, it travels faster in solid objects than in liquids or gases.
Therefore, the correct answer to the question is a) Temperature and pressure.