I THINK it’s the 2nd, 4th, and 5th but I may be incorrect
As the star runs out of nuclear fuel, some of its mass flows into its core. Eventually, the core is so heavy that it cannot withstand its own gravitational force. The core collapses, which results in the giant explosion of a supernova. The sun is a single star, but it does not have enough mass to become a supernova.
The car whose production of carbon dioxide is least will have the most percentage reduction in the amount of hydrocarbon emission.
<h3>What is a hydrocarbon?</h3>
A hydrocarbon is a compound which is composed of hydrogen and carbon only.
Hydrocarbons are important as they are commonly used as fuels for many vehicles.
The products of the combustion of hydrocarbons are carbondiodioxide, water and heat.
Because of the effect of carbon dioxide as a greenhouse gas, many vehicles are switching to fuels with less hydrocarbon emissions.
Therefore, a car whose production of carbon dioxide is least will have the most percentage reduction in the amount of hydrocarbon emission.
Learn more about hydrocarbons at: brainly.com/question/3551546
How does precipitation eventually return to the oceans?
- <em>Direct</em><em> </em><em>precipitation</em><em> </em>
- <em>The</em><em> </em><em>rain</em><em> </em><em>water</em><em> </em><em>falls</em><em> </em><em>directly</em><em> </em><em>into</em><em> </em><em>the</em><em> </em><em>ocean</em><em> </em><em>when</em><em> </em><em>it</em><em> </em><em>rains</em><em>,</em><em> </em><em>And</em><em> </em><em>this</em><em> </em><em>kind</em><em> </em><em>of</em><em> </em><em>precipitation</em><em> </em><em>is</em><em> </em><em>called</em><em> </em><em>direct</em><em> </em><em>precipitation</em><em>.</em><em> </em><em>And</em><em> </em><em>the</em><em> </em><em>water</em><em> </em><em>that</em><em> </em><em>falls</em><em> </em><em>on</em><em> </em><em>the</em><em> </em><em>land</em><em> </em><em>flows</em><em> </em><em>to</em><em> </em><em>the</em><em> </em><em>ocean</em><em> </em><em>through</em><em> </em><em>rivers</em><em>.</em>