It won't come as a surprise that all three of these are pronounced fang, but note the tones carefully!

芳 Fāng is 'aromatic':

This character is common in names. The element on top is the grass radical.

访 Fǎng is 'visit':

Common word: 访问 fǎngwèn 'visit'

妨 Fáng is 'impede':

The element on the left is 女 nǚ 'woman'.