Polygenic characteristics are disproportionately affected by natural selection.

The natural selection on polygenic traits affects selection.

Explanation:

The natural selection process allows changes in frequencies of alleles in a character that is determined by single gene. The polygenic characteristics are disproportionately affected by natural selection as natural selection affect the phenotype distribution.

This occurs in three ways that are disruptive selection, stabilizing and directional selection.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate