Describe five ways science and technology have expanded the food supplies

1)they used the science to make more ingredients

2)they used scientific evidence to see what kind of food is the safest

3) they found out which animal was the safest to eat

4) they made more ingredients using earths materials

5)they used technology to analyze the ingredients of food and sort of "upgrade" them.

changeable lenses of different focal lengths allow light to enter the camera, which then forms the image on light-sensitive film" is the one among the following statements about working principle behind a basic still camera is true.