gravel extraction(Obtaining a mixture of coarse sand and small water- worn or pounded stones, (used for paths and roads and as an aggregate) from the earth)
chrysophyta(The golden-brown and orange-yellow algae; a diverse group of microscopically small algae which inhabit fresh and salt water, many being planktonic. They contain carotenoid pigments and may be unicellular, colonial, filamentous or amoeboid)
dragonfly(Any of the insects composing six families of the suborder Anisoptera and having four large, membranous wings and compound eyes that provide keen vision)