Identify the fallacy committed in the following argument:
“There must be intelligent life on other planets. No one has proven that there isn’t”

Correct option is A

The correct answer is (a) Appeal to ignorance.
The fallacy of appeal to ignorance occurs when someone argues that a proposition must be true because it has not been proven false, or vice versa. In this case, the argument is that there must be intelligent life on other planets because no one has proven that there isn't. This is a fallacy because the absence of proof is not proof of absence. Just because we haven't found intelligent life on other planets doesn't mean it doesn't exist.
The other options are incorrect:
 (b) False alternative: A false alternative occurs when someone presents two options as if they are the only two possibilities, when there may be other possibilities. This argument does not present any false alternatives.
 (c) Slippery slope: A slippery slope fallacy occurs when someone argues that a small step will lead to a much larger, undesirable outcome. This argument does not make any claims about slippery slopes.
 (d) Hasty generalization: A hasty generalization occurs when someone draws a conclusion about a population based on a small sample of that population. This argument does not make any generalizations.