<u>Answer:</u>
<em>The movement of air in a hot air balloon makes it move up into the sky.
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<u>Explanation:</u>
Convection takes place in fluids. Hot fluids are less dense than cold fluids and the difference in the densities determine the direction of flow of fluids. <em>Less dense fluid moves up and the denser fluid take its place. </em>
Thus hot air rises up and cold air fills its place. The hot air balloon contains burner which <em>pumps hot air into the balloon.</em>
Thus the air inside the balloon will be hotter than the air outside the balloon. <em>Thus the hot air rises up carrying the balloon forward.
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The answer is the blood plasma.
Antibodies are specialized proteins that travel through the blood stream and are found in bodily fluids. They are used by the immune system to identify and defend against foreign intruders to the body. Blood plasma contains proteins, salts and minerals, it serves a variety of functions including maintaining a satisfactory blood pressure and volume to supplying critical proteins for blood clotting and immunity.
A is the answer. This answer is also a question, and the answer to that question is 0.25
This kind of modeling is known as (D) simulation. A computer program is used to simulate an environment, in this case, the zoo. Instead of having to do an actual experiment which harms real animals, a simulation is done to cut costs and avoid using live samples.
