Where does the oxygen that we breathe come from? (Multiple Choice) - Water
- Carbon Dioxide
- Light
- Sugar

Hydrolysis of water is the process by which water divide to form oxygen, hydrogen ion. Option A is correct. The oxygen we breath is come from the hydrolysis of water during photosynthesis.

Photosynthesis:

It is the process by which plants produce sugar using Carbon dioxide and water in the presence of sunlight.

This completes in two phases

Light Dependent Phase:

Therefore the oxygen we breath is come from the hydrolysis of water during photosynthesis.

To know more about Hydrolysis of water, refer to the link:

link

Water

Explanation:

Scientists agree that there's oxygen from ocean plants in every breath we take. Most of this oxygen comes from tiny ocean plants – called phytoplankton – that live near the water's surface and drift with the currents. Like all plants, they photosynthesize – that is, they use sunlight and carbon dioxide to make food.

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1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

tissue

explanation:

it is actually formed by geoup of cells which is tissue