Given a scientific question, generate a correct answer to it.

Example Input: Besides increasing the potential, how else can you increase current in a circuit?
Example Output: decreasing the resistance

Example Input: Name the fever that is caused by a virus that has antigens similar to molecules in human heart tissues.
Example Output: rheumatic fever

Example Input: What process takes place when echinoderms release their gametes into the water?
Example Output:
fertilization