An analogous structure is one that: A. comes from a common ancestor, but now has a different function.
B. has the same function in multiple organisms but evolved independently each time, without a common ancestor.
C. no longer serves a function.
D. has exactly a 4 bone type structure, including upper arm, forearm, wrist, and hand/foot.

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.