Write an operational definitoin for each underlined idea in the space provided.

The first sentence is..

List the plants found in the ecosystem, with the smallest one first.

Smallest one is underlined.

So what in wondering is what is an operational definition?

Check this site for the meaning of "operational definition."

http://www.qualityadvisor.com/sqc/od_what.php

So would the answer be the smallest one means the one that is the least tall?

That would be one way to define "smallest one." It is also the most practical meaning.

An operational definition is a clear and specific statement that describes how a particular concept or idea will be measured or observed in a given context. It outlines the procedures or criteria that will be used to identify or determine the presence of the concept. In the context of the question, an operational definition would involve providing a specific criterion or method for identifying the "smallest" plant in the ecosystem.