The correct answer is B. Writing.
Writing is the process of putting data into a storage location. It is the opposite of reading, which is the process of retrieving data from a storage location. Writing is typically done by using a computer program to create a file, which is then stored on a storage device such as a hard drive or a USB drive.
The other options are incorrect. Reading is the process of retrieving data from a storage location. Controlling is the process of managing the operation of a computer or other device. Handshaking is a process used to establish communication between two devices.