It's a fantasy role-playing game.

DM: You are Keyleth, a half-elf druid . You are the member of the famous group of adventurers. Previously, After Vax tells him to follow you, Grog jumps in and meets her at the bottom. He continues down the tunnel to investigate and gets shocked and paralyzed by red algae-like tendrils mixed in with the plant life.
DM: Or you can redirect the flow. Up to you. What do you want to do? The abilities you have to choose from are part water, redirect flow, whirlpool, but that's not really in your realm, or flood.
Player: And how big was this tunnel?
DM: All the way across, I'd say it's about 25, 20 feet across.
Player: That's a big tunnel. I'll part it.
DM: Okay.
Player: Yeah.
DM: So you dive back down? When are you starting to part it?
Player: I yell to everybody else and I say, there's a tunnel through to the other side. Let's go. And I jump in and I'll sink and I'll start parting the water behind me.
DM: All right. So.
Player: Or, let me see, let me sink to the bottom and then I'll part the water in the tunnel straight ahead.
DM: Okay. Do you guys follow suit?
