A weekend in a city in Florida experiences fair weather with clear sky and no rain. Which of these activities are people in the city most likely to do?

i don't know what the picture looks like but i can take a guess and say maybe basidiomycetes?

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

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.