Read the following case and answer the following questions:
Prithvi enjoys helping his family by making good use of kitchen waste. While preparing a meal, he chops vegetables, peels potatoes, and cuts fruits. Instead of throwing away the fruit and vegetable peels, he collects them in a clay pot. Over time, bacteria and fungi decompose the waste to form nutrient-rich compost. Prithvi then sows seeds in the compost and waters them regularly. After a few days, the seeds germinate into young plants, which later grow into beautiful flowering plants. His eco-friendly efforts are appreciated by everyone in his family.
1. Identify the type of change occurring in germination of seeds into flowering plants.
2. Which pair contains only physical changes?