C. The UN helps provide peace between all nations.
Waves tend to travel faster through a hot material than a cold material. The reason behind this is that heat makes the waves obtain more kinetic energy. Thus, temperature and speed is directly proportional. As temperature rises, the speed of wave also increases.
Answer:
C. acid drainage
Explanation:
Many types of mining, such as for coal and copper, produce a specific type of water pollution called ___<u>acid drainage</u>_____.