Which activity does a local health department perform when providing health and environmental services?

Explanation:

Local health department links up patient with adequate health care needed especially area where good health facilities is reduces and cannot be access, they prevent spread of disease by given immunizations.

They also help in avoiding spread of diseases and infections by working with other health agencies to create awareness.

In the environment, some of them ensure access to to good and clean water, they develop plans when emergency cases arises and during disaster.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.