This is a hexagon tiling puzzle. The missing piece must exactly match the white shape inside the honeycomb when rotated if necessary.
Key observations 
The empty space has 6 hexagons.
The shape looks like an “X / butterfly” style layout:
Two hexagons extend left and right.
Two extend diagonally upward.
One extends downward.
Checking the options
1–4 → Wrong shapes or incorrect connections.
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