RED
The primary functions of red blood cells are to transport oxygen from the lungs to tissues, maintaining adequate tissue perfusion, and transporting CO2 from the tissues to the lungs.
The white globules have the role of defending the body in various ways, and structure the immune system.
There are no blue globes!
In order to truly understand an event - whether personal or historical - it is necessary to look at it from multiple perspectives.
Just like you cannot understand history from just one book, you need to ask multiple persons to help you with your personal event.
The correct option is D. Volcanic eruption released large amounts of water vapor into Earth's early atmosphere.
Earth’s first atmosphere had lots of water vapor but it almost lacked oxygen. Eventually, frequent volcanic eruptions put several different gases into the air. These gases created a new type of atmosphere for Earth. The volcanic eruptions spewed gases such as nitrogen, carbon dioxide, hydrogen, and water vapor into the atmosphere, but no free oxygen. Without oxygen, there could not be life on Earth.
To provide food and shelter for the slum-dwelling poor
