Question

4. What happens to old leaves when plants grow?​

Answer 1

Answer:

they fall and turn into humus

Explanation:

Answer 2

Answer:

Photosynthesis– a process that happens in the leaves of plants where sunlight, water, and carbon dioxide (from the air) are converted into food and oxygen. ... It makes leaves red and purple when the leaves are exposed to sunlight.

or

As plants grow, they shed older leaves and grow new ones. ... On very cold, dry days, these leaves sometimes curl up to reduce their exposed surface. Evergreens may continue to photosynthesise during the winter as long as they get enough water, but the reactions occur more slowly at colder temperatures.