You'll get brainliest if you get it right : ))

which of the following correctly matches the component of respiration with its job description?
a. nadh-- electron carrier
b. oxygen-- initial electron acceptor
c. atp-- intermediate carbon molecule
d. fadh2-- sugar convert

First option is correct.

Explanation:

NADH - It is used for mental alertness and clarity. It is also used in Alzheimer's disease.

It is used as a reducing agent to carry electrons

So, it is carrier of electrons.

NADH is known as electron donor because of which it is used in electron transport chain.

So, NADH - Electron carrier is correctly matched with its job description.

Hence , first option is correct.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

you know they are heterozygous for a trait because they have it as jj or jj.