"A. labelling food supplies" and "B. monitoring water supplies" are both public health measures that have helped fight disease. Vaccinations are essential to public health.
Explanation:
Woody plants, such as trees, tend to have more genetic diversity, on the whole, than vascular plants, such as grasses. Part of the diversity is due to the size of each species' geographic range and how far they can move their genetic information, for example through wind pollination or animal seed dispersers
Some of them could have to emigrate or move lower down the tree and adapt to their new habitat<span />
