what device is required to connect to the internet?\no wi - fi\no an isp\no a router\no a modem

Answer

Brief Explanations:

Wi - Fi is a wireless technology, not a device. An ISP (Internet Service Provider) is a company, not a device. A router can direct network traffic but needs a connection source. A modem is a device that converts signals to allow connection to the Internet from an ISP.

Answer:

D. a modem