Correct sentence (simple):
Bees pollinate flowers. Because of that, we get juicy apples in the spring.
Short grammar notes (easy):
- Start the sentence with a capital letter: "Bees" not "bees".
- Use a period to finish a complete thought: "Bees pollinate flowers."
- To show cause and effect, you can say "Because of that, ..." or "As a result, ..."
One more natural option:
Bees pollinate flowers, and as a result we have juicy apples in the spring.
Quick science note for you (easy):
- In spring, apple trees grow flowers.
- Bees visit the flowers and carry pollen from one flower to another.
- When flowers get pollinated, the tree can make apples.
- Apples grow after the flowers; they often become ripe and juicy later (in summer or fall).
If you want the sentence even shorter for a child: "Bees help flowers make apples." That is simple and correct, too.