Explain Kotlin's scope functions: let, run, with, apply, also

This tests your grasp of idiomatic Kotlin, specifically your ability to articulate the two core differences between scope functions: the context object reference (`this` vs. `it`) and the return value (the object itself vs. the lambda's result). A strong answer first defines these axes, then correctly categorizes each function (e.g., `apply`/`also` return the context object), and explains the idiomatic use case for each, like using `apply` for object initialization. A red flag is advocating for their use in ways that decrease code readability.