Sunlight and carbon dioxide.
<span>Energy produced in the center of the sun
flows out through the sun's layers in different forms, including visible
light. The sun's interior generally becomes cooler and less dense as
you move away from the center. </span><span>Rising currents of hot gas in the convection zone carry energy toward the sun's surface.</span>
Tundra is the climate zone that <span>has cool summers, cold and harsh winters, a dry climate, and sparse vegetation. Tundra is basically the type of biome where the growth of trees are hindered due to very short growth season and extreme cold. I hope that this is the answer that has actually come to your help.</span>
Answer:
The Printing Press
Explanation:
In the 15th century, an invention called the printing press enabled people to share knowledge more quickly and widely. Civilization never looked back. Knowledge is power, as the saying goes, and the invention of the mechanical movable type printing press helped disseminate knowledge wider and faster than ever before.
