Answer:
molding sand, washed sand, beach sand, mason sand, and silica sand
Explanation:
they all have different features and are better for certain things, for example some of silica sands features are
Molecular Weight: 60.084 g/mol
Exact Mass: 59.966756 g/mol
Boiling Point: 4046°F at 760 mm Hg
Melting Point: 3110°F
B phenotype (think pheno= physical)
the answer is differentiation
A gene pool changes throughout evolution this could be natural selection, genetic drift or a mutation. A gene pool does this to adapt with the needs of the environment it is in