Which is a resource that the National Park Service manages? memorials
wildlife refuges
ecosystems
endangered species

100 dollars because yeah

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.