PLEASE I NEED HELP I WILL GIVE 20 POINTS. What is an Autotroph?

Question 3 options:

organisms that food by eating other organisms or the remains of other organisms.

organisms that produce their own food

the third phase of mitosis, in which the chromosomes split and move apart

the diffusion of water across a semipermeable membrane

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced.be sure your answer has the correct number of significant digits.