A.
The respiratory system transports oxygen and other nutrients to the heart for the circulatory system.
I hope this helped you hon
Condensation is the collection of droplets on a cool surface when humid or warm air is in contact with it. an example would be if you had a glass of ice water, after a while the outside of glass would have water droplets.
a freezing point is the temperature at which a liquid turns into a solid. an example would be if you were to take a glass of water and place it in the freezer overnight it would freeze.
a melting point is the temperature at which a solid will melt. an example of a melting point would be 32 degrees Fahrenheit or 0 degrees Celsius for water.
sublimation is the chemical process of which a solid turns into a gas without going through a liquid stage an example would be when Ice Cubes "shrink" in the freezer.
vaporization is the process when a chemical or element is converted from a liquid or a solid to a gas. for example liquid nitrogen is an inexpensive cryogenic liquid that has a temperature of -190 degrees C, which is very near its boiling point. when exposed to room temperature, the liquid boils, and gives off a invisible nitrogen vapor. if you were to spill some liquid nitrogen on the floor, it would make a puddle, then vanish in a few seconds. Heat from the room and there's a puddle and raises its temperature and causes the liquid to evaporate.
Hope this helps!
D. Cannot repopulate the world with endangered organism
Climate change as been the most of the problem
