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❖ The correct answer is tissue.
Cells → Tissues → Organ → Organ System → Organism
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~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ
Answer:
An acid increases the concentration of H+ ions. A base is a substance that releases hydroxide (OH-) ions in aqueous solution, donates electrons and accepts protons.
Acid:Lemons, oranges, vinegar
Base:Soap, toothpaste, bleach, cleaning agents, limewater,
Explanation: