The knee joint is essential for walking and running.

The trick used by the magician completely fooled the audience.

The artist spent the entire day in his studio painting a new canvas.

She obtained a Bachelor of Arts at the university.

Martial arts are a form of physical and spiritual expression.

Visual arts are a form of artistic expression.

The definite article is used to indicate a specific object.

I bought a book yesterday.

She is beautiful without artifice.

She sang without artifice.