Which sentence is correct?

• It is sunny and hot.
• A boy is swimming in the sea.
• A girl is playing with two brown dogs.
• Mum's dress is blue.
• A hat is on the rug.
• Dad is drinking juice.
• The rug is yellow.
• A book is on the sand.
• Mum is eating an apple.
• A girl is playing with two black dogs.
• Boys are swimming in the sea.
• Dad's trousers are green.