the arthropods are the most successful group of animals; several key features explain their success. check all of the features that one would use to classify members into this phylum.

and after water is usually warmed by the sun the water temperature raises and then evaporates .

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.

your answer is going to be physical weathering