a cheerful fruit vendor holds up a perfectly round citrus fruit with tough, bright reddish-yellow rind for a customer to see. The vendor points to the fruit's distinctive colored skin while explaining its freshness. The customer reaches forward with interest, examining the fruit's smooth, vibrant outer surface. Other similar round citrus fruits with the same bright reddish-yellow coloring sit arranged in wooden crates nearby. a round citrus fruit with a tough bright reddish-yellow rind being displayed and examined