Answer: <u>Option 4; Oxygen gains electrons and hydrogen to form water.
</u>
Respiration is a process where glucose is used and energy is released stored in this molecule. Oxygen is used during respiration as well and it gains the electrons and hydrogen to form water. And, gain of electrons is an oxidation reaction. So answer is option 4.
Since, oxygen is consumed during respiration, option 1 is incorrect.
Loss of electrons is reduction, so option 2 is also incorrect.
Glucose is used in respiration, thus option 3 is incorrect.
Do you have to come up with your own biome or did they describe one to you for you to figure out ? if so can you give me the description and if not let me know and i’ll come up with a biome for you !
Antibiotics can be used to treat sickness
There are many human activities that have aggravated the planet through the phenomena of global warming. However, the biggest contributor to global warming is human use of fossil fuels and the resulting emissions from this use. The use of automobiles, factories, and other fossil fuel burning activities have led to a dramatic increase in greenhouse gases in the atmosphere which has led to global warming.