The answer is a meteor.
Meteors make flashing light when they enter the Earth's atmosphere. This is actually meteors on fire, because our atmosphere makes them burn when they come in contact, and crashes them under the pressure. This makes up for a beautiful sight on the night sky, and people often refer to the burning meteors as ''falling stars'', and make wishes as well.
Here is your answer:
Your answer is C decrease!
Reason: That's because when their are two predators who eat the same animal their animal species will decrease because of new predators that will eat them!
Your answer is C.
Do you speak english?..maybe i could help
