Leo: Hey Mia, what can we do to make our Earth a better place in the future?
Mia: Hmm, I think we should plant more trees and recycle all our plastic.
Leo: That's a great idea! And maybe we can use less electricity, too.
Mia: Yes! If we all do a little, Earth will be a beautiful home for everyone in the future.
Leo ve Mia'nın konuşmasının ana fikri nedir?
A) Planning a picnic.
B) Protecting the Earth for the future.
C) Their favorite tree types.
D) How to save money on electricity.