The correct answer is: a) Handlooms.
Tribal communities in Assam excel in weaving fabrics with intricate designs and patterns using handlooms. Handlooms are a type of loom that is operated by hand, and they are used to weave a variety of fabrics, including cotton, silk, and wool. The intricate designs and patterns that are woven into the fabrics by tribal communities in Assam are often inspired by nature, and they reflect the rich culture and heritage of these communities.
Option b) is incorrect because power looms are machines that are used to weave fabrics, and they do not produce the same level of intricate detail as handlooms. Option c) is incorrect because tribal communities in Assam do not use power looms. Option d) is incorrect because specialized embroidery techniques are not used to weave fabrics.