Which of the following is true about biofuels?
a. they are made from plant materials and animal fats.
b. they are made by directly harnessing energy from the sun.
c. they use energy from water.
d. they use energy from the earth���s core.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.

the answer is c.mitochondria. glad to .