In any food web, the organisms that are responsible for converting raw energy into usable chemical energy are collectively called while organisms that recycle the nutrients trapped in dead organisms are collectively called a) producers; consumers b) producers; decomposers c) heterotrophs; consumers d) heterotrophs; autotrophs

Anew organism has been discovered. this organism has a bilaterally symmetric unsegmented body. it's capable of moving on its own with a muscular appendage and is encased in a large shell that seems to be attached to its body. based on this evidence, which phylum would this new animal likely be classified into? a. arthropoda b. echinodermata c. nematoda d. mollusca