which sentence includes a nonrestrictive clause?\ncamels, which sway from side to side as they walk, are…

which sentence includes a nonrestrictive clause?\ncamels, which sway from side to side as they walk, are often called ships of the desert.\nfor centuries, camels have been used to transport people and cargo through the desert.\nnot only do they need very little water, but camels can drink water that is salty or bitter.\ncamels can live in extreme conditions, such as in areas with extreme heat, aridity, and a lack of vegetation.
Answer
Brief Explanations:
Una cláusula no restrictiva es una cláusula que da información adicional que no es esencial para la comprensión principal de la oración y está separada por comas. En la oración "Camels, which sway from side to side as they walk, are often called ships of the desert", "which sway from side to side as they walk" es una cláusula no restrictiva.
Answer:
Camels, which sway from side to side as they walk, are often called ships of the desert.