Why might females botos look for displays such as lifting large rocks as a way to choose a mate?

That is known as sexual selection

Explanation:

The greatest potential that males have to broaden their reproductive success is that in the vast majority of species they have perfected many characters that are extravagant, and are used to compete for females. This extravagance is not arbitrary, but those characters become signals in which both potential male and female competitors are interested. Sexual selection is a determining factor in several facets of the life of living beings and promotes the increase of diversity, negatively influencing the risk of extinction.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

um i think it might be a car?