The exchange of nutrients and respiratory gases occurs between these small, one-cell wide vessels, and the blood and tissue fluid around the cells.
a. arteries
b. veins
c. capillaries
d. arterioles

( C ) Capillaries

Explanation:

Capillary is the smallest blood vessels of the body , of 5 to 10 micrometres diameter.

These blood vessels forms a large network in the body.

The function of the capillaries is to exchange nutrients , oxygen , waste in between the blood and the tissues.

The blood flow in the body is as follows-

The blood flows from the heart via arteries , which further branches into arteriols , which further branches into capillaries , where the nutrients get exchanged .

After the exchange process is done , then the capillaries merge to become wide, venules , these venules further widen to become veins , and the blood is returned back to the heart by the vein , venae cavae.

answer:

thousands of years before the arrival of the british, australia was settled by the indigenous people of australia called the aborigines. this timeline begins when the europeans first arrived. 1606 - the first european to land at australia is dutch explorer captain willem janszoon.

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answer:

i don't believe the ocean is purple, but it might once have been:

as for the sky, according to nasa:

"sunlight reaches earth's atmosphere and is scattered in all directions by all the gases and particles in the air. blue light is scattered more than the other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time."