Why does a praying mantis have a big abdomen?

A praying mantis has a big abdomen primarily for reproductive purposes. The enlarged abdomen houses the ovaries and provides space for developing eggs, allowing the female to produce a large number of offspring. Additionally, the size can aid in digestion, as mantises are carnivorous and rely on digesting their prey efficiently to obtain the necessary nutrients. This adaptation enhances their survival and reproductive success in their environments.