Answer:
Heart of stone: Cruel or stern nature
"My teacher has a heart of stone"
Walking Encyclopedia: Very knowledgeable about everything
"Joey is a walking encyclopedia"
Music to my ears: Exactly what you want to hear
"His voice is music to my ears"
Tall tree: Taller in height like a giant
"He is a tall tree"
Explanation:
Have a good day
-Illumi
