Explain plain weave and its variations with diagrams.

1. 1 · Open in two lines. Plain weave is the simplest weave: each weft goes over one and under one warp. It is the most widely used weave.
2. 2 · Draw the drafts. [Squared-paper drafts: plain chequerboard, 2 × 2 basket, rib]
3. 3 · Plain weave.
   • Two harnesses; most interlacings.
   • Firm, flat, same both sides; good for printing.
   • Creases; e.g. cambric, voile, khadi.
4. 4 · Rib weave. Thicker or grouped yarns in one direction form ribs: poplin, taffeta, grosgrain.
5. 5 · Basket weave. Two or more yarns interlace as one: 2 × 2, 2 × 1; porous and soft but snags: oxford, monk's cloth.
6. 6 · Daily-life link. Plain-woven cotton for aprons and hospital sheets; basket weaves for table mats.
7. 7 · Close in one line. Changing yarn size or grouping turns plain weave into rib and basket weaves with new looks.

Scoring tip: Three small drafts on squared paper are the heart of this answer.