What is the purpose of passwords on school Wi-Fi, the function of a robot control system, and the use of the symbol tool in MS Word?

Passwords on a school's Wi-Fi are used to restrict who can connect to the network, thereby preventing unauthorized individuals from gaining access.

• The correct answer is B. unauthorized access.

The robot control system acts as the "brain" of the robot, interpreting commands and sending signals to actuators to control the robot's physical actions, such as movement.

• The correct answer is A. regulate the robot's movement.

The device shown in the figure is a portable hard drive. Its primary function is to save and retrieve digital data.

• The correct answer is B. store information.

In Microsoft Word, the "Symbol" tool allows users to insert special characters, including various currency signs like the Ghana cedis sign, that are not typically found on a standard keyboard.

• The correct answer is C. symbol tool.

Features like bold, italicize, and underline are text formatting options. In word processing applications, these are typically found on a toolbar specifically dedicated to formatting.

• The correct answer is C. format toolbar.

Transition effects in Microsoft PowerPoint are animations that occur when one slide changes to another. Their purpose is to make the presentation flow smoothly and visually appealingly between different slides.

• The correct answer is D. create a smooth flow between slides.

To access a location or information quickly by scanning, a QR code is commonly used. QR codes can store various types of data, including GPS coordinates or website links that lead to location details.

• The correct answer is D. QR code.