Which factor will likely have the greatest influence on Japan’s demographic changes between now and 2050?

technological changes
food production
natural resources
healthcare needs
social customs

You find a mysterious, dull substance on the ground and pick it up for a closer look. it is powdery, very light, and soft to the touch. the substance is most likely i. an organic mineral ii. a metallic mineral iii. a nonmetallic mineral i only ii only iii only i and ii i and iii