Answer: A command button and a check box can be added to a form to automate user tasks.
A command button can be used to trigger an action or a series of actions when the user clicks on it. For example, a command button can be used to submit a form, clear a form, or open a new window.
A check box can be used to allow the user to select or deselect an option. For example, a check box can be used to indicate whether the user wants to receive promotional emails or not.
A text box and a label do not automate user tasks, but rather provide a way for the user to input or view information. A text box is used to allow the user to input text or numerical values, while a label is used to provide a description or title for a form element.