The correct answer is A. Larva eat and kill invasive cactus.
Step-by-step explanation:
The cactus moth, biologically known as Cactoblastis cactorum is a moth species mainly known for feeding on cacti. Indeed, the larvae of this species help decrease the population of certain cacti as they eat and kill cacti. Due to this, this species was taken from its natural habitat to areas such as Australia to help ranchers decrease the number of cacti. This was positive during the first yeats, but soon the species became invasive and nocive for other species because in this habitat there were no natural predators for the moth.