Question

3 nettles are not the only plants that use poison, though. plants like milkweed have poison in their leaves to keep hungry creatures away. some animals avoid milkweed because eating the leaves of milkweed plants makes them sick. plants also use poison to protect their berries, seeds, flowers, and stems. that is why humans should not touch or eat any plant they are not familiar with.
4 acacia trees have a different way to keep enemies away: they hire \soldiers\ to protect them. the acacia tree provides a home and food for stinging ants. in return for their cozy life inside the trees thorns, the ants defend the tree against intruders. for example, if an unwanted animal gets too close to the acacia tree, then the ants will fight the animal off by stinging it.
based on clues in the text, what might happen to people if they eat unfamiliar plants?
they might become angry or upset.
they might need to go to the hospital.
they might start feeling hungrier than before.
they might start growing hair faster.

Explanation:

The text says plants use poison to protect parts like berries, seeds, etc., and humans shouldn't touch/eat unfamiliar plants. Eating a plant with poison (unfamiliar) would likely make people sick, requiring medical attention (hospital). The other options (angry, hungrier, faster hair growth) don't relate to plant poison effects.

Answer:

They might need to go to the hospital.