I hope you are doing well.
We have hired 2 new assistants.
The correct answer is
“Sea mountains form a thriving ecosystem of underwater plants and animals, some of which have never been documented by scientists.”
By noticing how the character interacts with other charactersby noticing details about what the character says, does, and thinksby noticing how the other characters perceive the characterby noticing the context, and use it to make inferences about the character