If those are the optional answers, it's most likely sodium.
Answer:
Farms
laundry detergents
pet wastes
Water treatment plants
Explanation:
Because its not construction materials or mining wastes.
A rainforest plant would be least affected by the loss of guard cell function that closes the stomata.
<h3>What is Guard Cells?</h3>
Guard cells are types of specialized plant cells present in the epidermis of leaves, stems, and other organs that are used to control gas exchange.
They are produced in pairs with a gap between them that forms the stomatal pore. They are kidney-shaped cells that surround stomata and control the opening and closing of stomata.
When there is an excess of water in the plant, the guard cells swell and form a hole for the exchange of gases.
Thus, a rainforest plant would be least affected by the loss of guard cell function that closes the stomata.
Learn more about Guard cells, here:
brainly.com/question/23382759
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The answer to your question is C!
It is Gravity.
Hope this helps.
