Which is biotic, i. decomposers ii. energy flow iii. producers

Ineed to know why d is the correct answer asap

How is transcription similar to translation in terms of base pairing?

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere