Final answer:
An upright posture refers to limbs positioned vertically beneath the body, while a sprawling posture refers to limbs positioned horizontally away from the body.
Step-by-step explanation:
The difference between an upright and sprawling posture is the position of the limbs in relation to the body. In an upright posture, the limbs are positioned vertically beneath the body, allowing for balance and efficient movement. In contrast, in a sprawling posture, the limbs are positioned horizontally away from the body, keeping the animal low to the ground.