This example of sedimentary rock is formed when rock fragments, minerals, and the remains of plants and animals are deposited as sediments and are then
a) chemically weathered by water.
b) compacted and cemented together.
c) recrystalized under the weight of the layers.
d) melted due to increased temperature and pressure.

The answer is B

Explanation: This is because they are compacted together. Most often the rocks you see are sedimentary. For example, a comgermarete.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

in addition to being able to metabolize, grow, digest food, and excrete wastes, what other functions must an organism perform if it is to survive? survival also depends on the ability to maintain one's boundaries, to move, to respond to stimuli, and to reproduce. oxygen is a survival need.