Please I really need this !! Potassium loses electrons when it reacts with oxygen. Which statement is true of potassium in this reaction? A. It reduces.
B. It undergoes synthesis.
C. It undergoes redox.
D. It oxidizes​

[D] It oxidizes.

4K + O2 → 2K2O, potassium oxide is produce.

We have the equation, in which when potassium react with oxygen, as a product it formed Potassium oxide which means adding of oxygen (oxidation).

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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force tends to be low and long diustance masses are high