Answer:
1. B
2. A
3. D
Explanation:
plz mark brainliest if right. sorry if wrong
Answer:
C. Producers
Explanation:
Producers (plants) can turn the sun's energy into usable energy by photosynthesis. They are at the bottom of the food chain; all of our energy comes from them. :)
A because I learned that last year in science
Skin, tears, mucus, cilia, stomach acid and urine flow