What Is It Made Of?

Riddle: A red house is made of red bricks. A yellow house is made of yellow bricks. A purple house is made of purple bricks. A brown house is made of brown bricks. A black house is made of black bricks. What is the greenhouse made of?

Answer: A greenhouse is made of glass.

Source: https://www.riddles.com/11362

A red house is made of red bricks. A yellow house is made of yellow bricks. A purple house is made of purple bricks. A brown house is made of brown bricks. A black house is made of black bricks. What is the greenhouse made of? — What is it made of? by Serpent v1.

Riddle: A red house is made of red bricks. A yellow house is made of yellow bricks. A purple house is made of purple bricks. A brown house is made of brown bricks. A black house is made of black bricks. What is the greenhouse made of? Answer: A greenhouse is made of glass. — by Serpent v2.