Q.leaves droop and curl -Umbrella house plant
Why? ? Please tell me what to do and what causes drooping and curling leaves?

Over- or under-watering can cause curling and drooping leaves on some plants, and insects can also cause curling leaves. Make sure your plant has all the conditions it needs for health and that no insects are visible on the leaves:
https://www.gardeningknowhow.com/houseplants/schefflera/schefflera-plant-care.htm
https://www.gardeningknowhow.com/houseplants/hpgen/botany-911-first-aid-for-ailing-houseplants.htm