Final answer:
The given statement is an argument. If extrasolar planets exist, there is a chance of finding extraterrestrial life.
Step-by-step explanation:
The given statement is an argument. An argument is a logical sequence of statements that support a conclusion. In this case, the conclusion is that there must be a chance of finding extraterrestrial life.
The argument is based on the premise that if extrasolar planets exist, there is a chance of finding extraterrestrial life, and the additional premise that extrasolar planets do exist. By linking these premises together, the argument concludes that there must be a chance of finding extraterrestrial life.