What are the main differences between a harmonica and a harp in terms of their construction and playing techniques?

The main differences between a harmonica and a harp are in their construction and playing techniques. A harmonica is a small, handheld instrument with reeds inside that vibrate when you blow or draw air through it. It is played by using your mouth to create different notes. On the other hand, a harp is a larger instrument with strings that are plucked or strummed to produce sound. It is played by using your hands to manipulate the strings and create melodies.