A(n)\ is a system composed of living organisms and their interaction with the surrounding environment, where the main focus is the interaction and relationship between species . 1.habitat
2.biome
3.environemnt
4.ecosystem

answer; ///i believe its: ///(embolus);

b. lithosphere, asthenosphere, mesosphere   is the answer most likely

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products