proud winner
Other correct answers: happy winner, swift winner, brave winner, cheerful winner, lucky winner.
Why proud: A winner feels happy about something she did well. The word for that feeling is proudly, one of the New Words on page 68. Shabana is exactly this — she wins a cycle race and “happily celebrates her fastest pace”.
Tip: Four words from this chapter itself make good answers here — proud, swift, cheerful and brave. Using a new word from your own chapter is always a smart choice.
Your own sentence: The proud winner held up her medal for all to see.
All four together:
Tip from your book: “A word that tells you more about a noun is known as an adjective. Example: Blue sky, hardworking children.” All eight words you have written in part B — happy, red, fierce, beautiful, sweet, cute, fit, proud — are adjectives.