Darwin explained that evolution occur due to natural selection.
The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
there is no answer so stop cheating okay or i will tell your parent
<span>Hydrosphere means water-sphere.
The only answer that talks about water is "Water moves between Earth’s surface and the atmosphere" </span>
The answer should be A plant cell
