Environment is the quality of space your body actually thrives in. Not geography, not one perfect city, but the shape and feel of the rooms you spend your days inside. Get this right and much else settles: your body relaxes, your mind clears, your decisions land better, and the right people find their way to you. It is one of the four deep transformations in your design, and it holds up the others, because everything in you works better when you are in the correct place.
Caves belong to the built half of this system, the bounded spaces people make rather than the open country. That tells you where to look. Your attention belongs on your immediate surroundings and on what this particular space gives you: the walls, the doorway, the light, who else is in here with you. You are not scanning a horizon. You are reading the room you are standing in, and asking whether it can hold you.
Your modality is Blending, and your arrow points right, which makes this receptive rather than controlling. You still need the enclosed space with one way in, but you do not have to stand guard at its doorway. Your boundary is softer and more permeable: a shared enclosed space can suit you, and some mixing inside it is welcome, as long as it stays a small, contained setting rather than a crowd. Find the room that already feels right, let the container do the work, and hold the door loosely instead of managing it.
You will know you are in the right place because you sink in and lose track of the room entirely. Time goes soft, you stop performing, and you are simply there. The wrong place is exposed and thin: the open floor, the glass wall, the space with too many ways through it and nothing to fold into. When you feel oddly on show, or you cannot stop noticing the room, that is the signal. Go somewhere that closes around you and let it absorb you again.