Explanation:

- The underlined word "sprightly" is typically used to describe someone who is lively and full of energy, especially in terms of movement.

- Option 1: Agile - This word means being able to move quickly and easily, which aligns well with "sprightly" as it implies liveliness and energy.

- Option 2: Spiritless - This describes someone who lacks energy and enthusiasm, the opposite of "sprightly."

- Option 3: Lethargic - This refers to a lack of energy and sluggishness, contrasting sharply with "sprightly."

- Option 4: Delightful - This means causing delight or pleasure, not directly related to the energetic aspect of "sprightly."