Answer:
B, Isotonic solution
Explanation:
In an isotonic solution, the flow of water in and out of the cell is happening at the same rate.
They produce hydrogen gas when reacted with metals
Answer :— Physical properties of plastic samples collected by SEA in the Atlantic Ocean indicate the collected material is made of HDPE (high density polyethylene), LDPE (low density polyethylene), and PP (polypropylene), which are used to make common household items such as milk jugs, plastic bags, and drinking straws.Plastics and polystyrene foam (Styrofoam) comprise 90% of all marine debris, with single-use food and beverage containers being one of the most common items found in ocean and coastal surveys.

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1.) is circulatory system. An easy way to remember this is, blood circulates throughout the body, CIRCULatory.
2.) Circulatory; resspiratory.
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The blank spaces in the task content should be filled with is; Three(3), atmosphere and ultraviolet rays of the sun.
<h3>What is Ozone?</h3>
Ozone is a trioxygen molecule; contained in the upper atmosphere with a sole aim of protecting biological life against ultraviolet rays of the sun. The ozone layer is however depleted to Oxygen molecule in the lower atmosphere.
Read more on ozone layer;
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