Question

B. Circle the odd-one out giving approrpirate reason.
1. Air. Oxygen, Nitrogen, Nitrogen dioxide, Water vapour
2. Respiration, Burning, Combustion, Photosynthesis
3. Birds, Human beings, Mammalian animals, Fish
4. Wind energy, Biogas, Parachutes, Electricity generation​

Answer 1

Answer:

1 air

2 photosynthesis

3 mammalian animals

parachutes

Answer 2

Answer:

1.) nitrogen dioxide.

2.) burning..

3.) mammalian animals.

4.) parachutes.

please mark as brainliest.pleaaaase!!!!!!!!!!