What do you mean by the term,' Weed'?​

weed means which feed on plants and takes nutrients from them weed also stops the growth of plant

so we have to uproot weed

Weed is the unwanted plants or crop which grow naturally in the field. And this can also infect all other plants. To remove weeds, we use weedicides.

a. by using fur or clothes to trap heat energy near the body

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.