What is an example of a valid function call?

This choice is invalid because it incorrectly includes the phrase "returns Val" within the function call. A valid function call should not include return statements or expected outputs; it should solely consist of the function name and its parameters.

This option is invalid due to the use of the keyword "integer" in the argument list. In most programming languages, the data type should not be specified in a function call; instead, just the values should be provided. Thus, the correct call should simply be "GetHeight(3, 4)".

This choice is invalid as it mistakenly uses the keyword "function" in the call. In a function call, the keyword is not required; it should simply be written as "Sample(2.0)". The presence of the keyword makes it look like a function declaration rather than a call.