Respuesta :
The correct answer is (a) There will a significant decrease in the number of earthworms.
If there is an ecosystem in which a snakes eat salamander, salamanders eat earthworms. If there is a decrease in the number of snakes, then the number of earthworms will also decrease. This will happen because, the number of salamander will increase as there is no snake to eat them. More salamanders will eat more earthworms and as a result of this the number of earthworms would decrease.