Step 1: Look at two clues in the picture together - a brown (hyperpigmented) flat patch and coarse terminal hairs growing on it, sited over the shoulder/chest. Pattern recognition of pigment plus hair points straight to Becker nevus. Step 2: Becker nevus is an androgen-sensitive hamartoma that surfaces around puberty, which explains the hypertrichosis. It grows gradually to about a palm's breadth and may carry scattered acneiform papules. Step 3: Ruling out distractors - option b (hypopigmented macule) would be lighter than surrounding skin, the opposite of this lesion; option c (Spitz nevus) is a solitary firm pink nodule, not a hairy patch; option d (epidermal nevus) is a warty streak along Blaschko lines without pigment-plus-hair. Step 4: Management is reassurance only since it is benign. Hence the correct option is Becker nevus.
\[\boxed{\text{Becker nevus}}\]
