What is the main function of a USB Type A connector?

The main function of a USB Type A connector is to connect peripherals to a host. USB Type A connectors are the standard format for USB interfaces used primarily to connect devices like keyboards, mice, printers, and other peripherals to a computer or host device. They facilitate communication between these devices and the computer, enabling data transfer and interaction.

While USB Type A connectors can indeed provide power to devices (which relates to charging), their primary role is not solely focused on charging or building networks. Options suggesting connections for external hard drives or local networks do not capture the broader and standard use of USB Type A connectors. They are designed with functionality that supports the connection of a wide variety of peripherals, making option B the most accurate answer.