Question

tell the odd one out and also reason
pls no scams

3. respiration in living organisms
burning of leaves
hammering of metals
burning of fuels​

Answer 1

Answer:

All of these processes other than hammering of metals require element oxygen. Hammering of metals doesn't require oxygen

Answer 2

Hammering of metals is a answer because :-

Burning of leaves leave ashes , Burning of fuels leave gases , Due to respiration process in living organisms, organisms leave CO2 or O2 gasesSo due to burning or respiration leaves ashes or gases but in hammering of metals big pieces are remained.So due to this reason Hammering of metals is a answer.