Respuesta :
it is a run-on sentence because if you read it straight through without punctuation, it sounds weird. there should be a period in between "hot" and "hurts." or at least a comma and an and
“The sand at the beach is hot it hurts to walk across it” is a run-on sentence. I am hoping that this answer has satisfied your query and it will be able to help you, and if you would like, feel free to ask another question.