I do not know. please help

b.cotton, rubber, sugar cane, tobacco, figs, rice, kapok, sisal, and species in the genus Indigofera, used to produce indigo dye

Explanation:

ok this answer is from the understanding of wikipedia but if you want a good answer send a pic of the book or read over the book . We cant answer things if we don't know the source of the problem.

answer; dead end or culdesac;