In the image below, what kind of molecules does the label A represent? A.
Water molecules

B.
Nitrogen molecules

C.
Oxygen molecules

D.
Carbon dioxide molecules

oxygen molecules

Explanation:

The arrows in the photo itself gives you the hint as you know in the picture they showed an arrow in which the tree is releasing something and we know that trees release oxygen gas which will be afterwards absorbed by the amimals and human beings.

Hope this helps and pls mark as brainliest :)

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

you know that this symptom is misleading and quite often is related to: heart attack

a heart attack is a condition that occurs when the blood flow that transports oxygen to the heart muscle is damaged or cut off completely. the coronary arteries that supply the heart muscle with blood flow can be blocked by the accumulation of plaque. also, when the plaque within the heart artery breaks, it creates blood clot that can also hinder the blood flow. men that are over 45years of age and women that are over 55years of age are at risk of having a heart attack. the symptoms of a heart attack include chest discomfort, chest pain, coughing, and shortness of breath.