Jump into the door frame so that Samus is falling when entering this room. Morph before reaching the lava and Bounce down to the bottom.

Entrance condition:

{
  "comeInJumping": {
    "minTiles": 4,
    "speedBooster": false
  }
}

Requires:

{
  "or": [
    "h_lavaProof",
    "canSuitlessLavaDive"
  ]
}
"canCarefulJump"
"canBounceBall"
{
  "heatFrames": 330
}
{
  "lavaFrames": 290
}