B. They protect against oxidative damage from excessive light energy
<h3>Explanation;</h3>
Some carotenoids seem to be function as photoprotectors.
These compounds absorb and dissipate excessive light energy that would otherwise damage chlorophyll or interact with oxygen, forming reactive oxidative molecules that are dangerous to the cell.
B. Healthier ecosystems. If you're talking about benefits, this is the only positive on this list. The others are listing the difficulties or downsides.
