Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Question: Like animals, protozoa are heterotrophic and capable of what? Answer: moving
Like animals, protozoa are heterotrophic and capable of moving.

Question: What is an element that tend to be malleable? Answer: metal
Metals tend to be malleable. This means that they can be formed into thin sheets without breaking. An example is aluminum foil, also pictured in the Figure below .

Question: What type of organism is algae? Answer: bacteria (cyanobacteria)
Describe why algae is a good source of biofuel.