Step 1: Understand the clue:
The question describes a tie dyed textile. Its pattern is made of zig-zag diagonal lines.
This kind of pattern comes from rolling and tying the cloth diagonally before dyeing.
Step 2: Recall the textile:
Rajasthan is famous for tie and dye textiles such as Bandhej, Mothra, Ekdali and Leheriya.
Leheriya (also spelt Laharia) is the one with diagonal wave-like stripes.
The word 'leher' means wave.
Step 3: How it is made:
The cloth is rolled diagonally from one corner and tied at intervals with thread.
It is then dyed. The tied parts resist the dye and stay light.
Opening the cloth gives zig-zag diagonal lines.
When the cloth is re-tied and dyed again in another colour, a criss-cross (Mothra) pattern forms.
Final Answer:
The blank is filled by Leheriya (Laharia), the tie dyed textile with zig-zag diagonal lines.