a measure of the product of tje number of species and number of runs divided by the number of trees is called?

"Enrichment Activity2" would be the appropriate response.

Explanation:

Enrichment opportunities or activities broaden the experience of a pupil in areas that vary from either the ways through which children study mostly during the academic period. The practice that encourages analytical thinking, learning, pattern recognition, imagination, and attention could become an enrichment exercise.

Called for cell.