My praying mantis is acting weird? he suddenly his sabdomen(stomach/bottom) is sucked in and he`s going to places very high and climbing them and standing still. his main diet os cave crickets and moths and he1s been eating very well. is it molting?

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more