What are the parts or processes that can describe an ecosystem? a. chemical changes b. flow of energies c. both chemical changes and flow of energies d. neither chemical changes or flow of energies

Which word correctly completes the sentence? both tracks are visible in the snow. a. deers' b. deer's c. deers 2.which word correctly completes the sentence? a huge diamond decorated the crown. a. kings' b. king's c. kings 3.which word correctly completes the sentence? at the old library, many of the covers were worn or damaged. a. books' b. books c. book's 4.which word correctly completes the sentence? in the traffic jam, cars moved at a pace. a. turtles' b. turtle's c. turtles plz asap