Secondary and Higher Education

Shellac is the refined state of lac acquired through the process of washing and filtration.

Estuaries are confined water areas where freshwater from lakes and streams merges with ocean saltwater, serving as transitional zones from rivers to maritime ecosystems, enclosed by land on both sides.

A homogeneous group of animals within a species, subspecies, or variety, characterized by shared descent and similarities in general appearance, size, configuration, and other features. Examples include Sahiwal and Brown Swiss.