Step 1: Understanding Validity/Invalidity.
In logic, validity and invalidity are terms that apply only to deductive arguments.
- A deductive argument is valid if the conclusion logically follows from the premises. If the conclusion does not logically follow, the argument is invalid.
- An inductive argument cannot be valid or invalid in the same sense, as its conclusions are probable, not certain.
Step 2: Analyzing the Options.
- 1. Deductive Argument: Correct answer. Validity applies to deductive reasoning.
- 2. Inductive Argument: Inductive reasoning involves probability, not validity in the strict logical sense.
- 3. Both Deductive and Inductive: Incorrect because inductive arguments are not judged by validity.
- 4. Moral Argument: Morality is not a logical category for discussing validity.
Step 3: Conclusion.
The correct answer is 1. Deductive Argument.
Final Answer:
\[
\boxed{\text{The correct answer is 1. Deductive Argument.}}
\]