healthy → vegetables
The full pair is healthy vegetables. Healthy food is food that keeps your body strong and well.
Why vegetables: Of the words left, only vegetables are eaten. Food is the only thing here that can make you healthy. A sky or a road cannot.
Link to the chapter: Let us Do on page 71 says, “Healthy and tasty food is liked by everyone.” Healthy vegetables give a fit body, just as playing does.
Your own sentence: Amma cooks healthy vegetables for our lunch every day.
All five matches together:
Tip: All five words on the left are adjectives — describing words. All five on the right are naming words. Every pair is “describing word + naming word”, exactly as your book explains on page 70.