Question

(ii) and (iv)
d) (ii) and
4. Respiration is a form of
a) combustion
b) photos
c) rusting
d) humid
5. Oxygen is used in
a) respiration only
b) photosynthesis​

Answer 1

Answer:

4). Combustion

Hope it helps.

Answer 2

Answer:

4.respiration is a form of combustion

4.respiration

Explanation:

4.

breathing(a part of respiration)is the movement of oxygen from the outside environment to the cells within tissues, and the transport of carbon dioxide in the opposite direction.

Respiration is the biochemical process in which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in cells)...so it's a form of combustion

5.

The process of photosynthesis, plants take in CO2 (carbon dioxide) from the air and combine it with water absorbed through their roots. They use energy from sunlight to turn these ingredients into carbohydrates (sugars) and oxygen, and they release extra oxygen to the air...so the process of photosynthesis releases oxygen to the air not use it for photosynthesis