Question

what are the users of oxygen
a) Living being
b) Combustion of fuel
c) Rusting of iron
d)All of these
Pls it is urgent​

Answer 1

Answer:

a living organisms

Explanation:

Mark me brain list

Answer 2

Explanation:

$all \: of \: these \: is \: right \: answer$

option (d) ,hope this helps you mate ✌️✌️