John attaches a ball to a spring

Eutrophication caused by human nutrient pollution.

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

First dropdown options: a. runoff b. condensation c. evaporation second dropdown options: a. photosynthesis b. transpiration c. sweating third dropdown options: a. raindrops b. clouds c. animals