Final answer:
To add content to PowerPoint lecture slides, such as learning objectives, images, and descriptions, you would utilize the Insert tab in the PowerPoint interface.
Step-by-step explanation:
When creating PowerPoint lecture slides, adding content to the slides is generally performed using the c) Insert tab. This tab in the PowerPoint interface is where you can add various types of content, such as text boxes, images, charts, tables, shapes, and multimedia elements. For example, if you want to enhance your lecture slides by adding learning objectives or images and descriptions, you would typically click on the Insert tab to bring up the options that allow you to insert these elements into your slides.