D. They help plants get nutrients and water form soill This is called mutualism.
Answer:
That would be option D. A motor.
Explanation:
The principles of probability can be used for B. Predicting the traits of the offspring of genetic crosses.
Answer: B. Predict the traits of the offspring of genetic crosses.
Hollow bones are always a disadvantage because it means that they are less sturdy and easier for predators to break.