What do both mechanical and chemical weathering have in common? A- they make the rock weaker and easier to erode. B-Nothing-they are completely different PLEASEE HELPP PLZZ

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

i think that d. wind is the answer.   i missed the question when i answered a. currents.

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.