What is the substance the influences a reaction but doesn't become a part of it

Whats one way that rocks do not follow the typical rock cycle pathway?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

Which component in a graph indicates an independent factor? a. y-axis b. x-axis c. scale