A shell script can call upon a function that resides in a separate file using what keyword?Group of answer choicessourceusingimportlocal

The keyword used in a shell script to call upon a function that resides in a separate file is source.

When you use source filename, it loads the functions defined in that file into the current shell session. Essentially, it allows you to include and execute the contents of another file as if they were part of the calling script.

Here's a brief explanation of the other options provided:

• using: This is not a keyword in shell scripting.
• import: This is often used in programming languages like Python, but not in shell scripting.
• local: This keyword is used to declare variables with a local scope within a function in shell scripting.

Therefore, the correct choice is source.