Answer:
The film technique of fading out one scene and fading in the next is known as a "dissolve".
Step-by-step explanation:
Option b. "Lap dissolve" is a type of dissolve in which one image gradually fades out while another gradually fades in, with the images overlapping for a brief period.
Option a. "Wipe" is a technique in which one image appears to "wipe" away the previous image as it moves across the screen.
Option c. "Iris-out" is a technique in which the image is gradually blacked out from the center to the edges, like closing the aperture of a camera.
Option d. "Cutting within the frame" is a technique in which a scene is edited within a single shot, such as by changing the camera angle or zoom level.