Which of the following sentences is written in a formal academic tone?
Did you hear? We gotta start planting some milkweed, bruh. That'll help monarch butterflies.
I totally think if we start planting more milkweed, it'll help increase the monarch butterfly population.
Experts believe planting milkweed will help provide a suitable habitat for monarch butterflies.
So some people seem to think that planting some plant will help butterflies. I don't know though.