1. The study of how living organisms interact with other living and non- living things in the environment is called:
a. energy
b. biodiversity.
C. sustainability
d. ecology

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

Select the word from the list that best fits the definition a system made of 25 satellites

18. which statement about cancer is true?