By interfering with the absorption of BILE in the intestine. Bile contains cholesterol, if it absorbed from the intestines it will increase the level of cholesterol in the blood stream. So, the viscous fiber stop this by sequestering the bile acids.
Absorbed into the blood by the mature enterocytes on the upper third of the intestinal villi
The asnwer is Angiosperms
D. Fold mountain that appeared wavy I think but just in case check an other answer