猜谜语 英语!急求.Hello! I’m long and thin. I’m yellow and there are

猜谜语 英语!急求.
Hello! I’m long and thin. I’m yellow and there are many flowers on my body. How nice I am!
Oh, it’s raining. I can give you a shelter. Oh, it’s hot. The sun is shining. I can give you some shade. Am I useful? Do you like me? Who am I?