Clarification Statement - S.2.ESS.2.1.CS:
Examples of solutions could include different designs for using rocks, shrubs, grass, and trees to hold back wind, water, and land.

Science and Engineering Practices - PK2.SEP6.3:
Compare multiple solutions to a problem.

Disciplinary Core Ideas - S.2.ESS.2.1.DCI:
ESS2.A: Earth Materials and Systems •Wind and water can change the shape of the land. ETS1.C: Optimizing the Design Solution •Because there is always more than one possible solution to a problem, it is useful to compare and test designs. (secondary to 2-ESS2-1)

Crosscutting Concepts - CC6.1:
Things may change slowly or rapidly.