The correct answer is option 2- "by eating sunflower seeds".
Explanation:
Cardinals are a species of bird that live in North and South America, characterized by its color being majority red with a minor proportion of black. Cardinals eat sunflowers seeds, serving as a predator for this plant and helping the ecosystem by reducing the size of sunflowers populations. Usually, people attract cardinals by putting sunflowers seeds in a bowl, and people who have them as pets feed them using them as well.
