The concentration of atmospheric carbon dioxide is currently decreasing due to human activities.
Please select the best answer from the choices provided
OT
OF

OF

Explanation:

human activites such as cars and boating need gas witch gives off carbon dixoide witch polute the earth

here's your

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the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation: