Which of the following choices describes the greenhouse effect?

the process of fertile land being converted to infertile land

the heat trapped in the atmosphere, which causes an increase in the earth’s temperature

the radiation of heat and light from the sun, causing daylight hours to be warmer than nighttime hours

the increase in sea levels and coastal erosion caused by global warming

To solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x? 6x + 5y = 2 4x + 2y = 8 a) subtract 2 times the second equation from 3 times the first equation b) subtract 3 times the second equation from 2 times the first equation c) subtract 5 times the second equation from 2 times the first equation d) subtract 2 times the second equation from 5 times the first equation