Here are three simple ways to say the same idea so a 7-year-old can understand:
- "Because it has a strong engine and a smooth skinny body, the speedboat goes really fast and is easy to steer."
- "The speedboat's powerful motor and smooth shape help it zip across the water and turn quickly."
- "With a strong engine and a sleek design, the speedboat moves fast and is simple to control."
All three sentences mean the same thing: the boat's strong engine plus its smooth shape help it go fast and make it easy to turn and steer.