Can someone help me pls

Isotopes of the same element have differ in their

Which soil would most likely be found in the arctic? andisols gelisols histosols spodosols

What is a food chain? a. different animals located in different communities b. energy transferred from the sun to plants and then to a series of living things c. rows of crops, such as lettuce, in a field d. animals using one another as food for energy and growth