Short answer: The sentence is grammatically correct.
Original sentence: "Shrikes stick their food on thorns of prickly plants so they can eat it later."
Simpler version for a 6-year-old: "Shrikes stick food on thorny plants so they can eat it later."
Step-by-step explanation:
- What is a shrike? A shrike is a small bird.
- What does the sentence mean? It means the bird puts food on sharp thorns of plants and comes back to eat it later.
- Why do they do this? To keep the food safe and to help them eat bigger bugs or pieces of meat more easily.
Small note: You can also say "on the thorns of thorny plants" or simply "on thorny plants." Both are fine. "Stick" is a simple, child-friendly verb to use here.