Multiple choice

Raw sap combines with … and transforms into elaborated sap

  1. oxygen

  2. carbon dioxide

  3. sunlight

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Raw sap, which consists of water and mineral salts, is absorbed by the roots and travels to the leaves. There, it combines with carbon dioxide absorbed from the air and, using sunlight, transforms into elaborated sap (the plant's food).