Fact 1: Dropping an object into water causes vibrations in the water. Fact 2: Lake water visibly disturbed. Given the two facts above, dropping an object into a lake causes what?

pick from the following. 1. replication; 2. Heat energy; 3. vibrations; 4. magnetism; 5. flooding; 6. contamination; 7. Pollution; 8. nourishment;
Answer:
3.