Expositive text

Why the text Creatures Clone Selves in Face of Danger is expositive?

Clara Moskowitz is a LiveScience staff writer. She wrote a text about the sand dollar larvae, which copy themselves when they sense predators near. This text is expositive for many reasons. One of them is that the author is objective and precise. In addiction the text basically is a series of explications and descriptions about how the sand dollar larvae created clone of themselves.