recycle materials use more products put the trash in a landfill pick up the trash on the ground
I gave my students this multiple choice question: Many people throw away almost five pounds of trash each day. How could everyone decrease the amount of trash thrown away daily?

Only one answer is correct among these 4 choices:
- recycle materials
- use more products
- put the trash in a landfill
- pick up the trash on the ground

Could you tell me which one is correct?

recycle materials