An Instant Experience is the correct solution because it is a fullscreen, mobile-optimized format that can combine multiple rich media components. The home improvement store can use an Instant Experience to feature a video of the renovated room while also including a carousel component that allows customers to interactively scroll through various products, directly replicating the functionality of their original ad in an immersive, fullscreen environment.

A. Video: A standard video ad does not allow users to interactively scroll through a selection of different products at their own pace.

C. Slideshow: A slideshow creates a lightweight, video-like ad from images. It is a passive viewing experience and does not allow for interactive scrolling through products.

D. Single image: This format cannot accommodate a video or a scrollable gallery of multiple products, failing to meet the core requirements of the advertiser.

1. Meta Business Help Center, "About Instant Experiences": This document states, "An instant experience is a full-screen experience that opens after someone taps your ad on a mobile device... Within an instant experience, people can watch engaging videos and photos, swipe through carousels, [and] explore lifestyle images with tagged products." This confirms its ability to combine video and a scrollable carousel in a fullscreen format.

Source: Meta Business Help Center, Article ID: aBu5OK12BmaXbnO.

2. Meta Business Help Center, "Components for Instant Experiences": This page details the available components, explicitly listing "Video" and "Carousel." It describes the carousel component as allowing people to "swipe through a series of images." This directly supports the requirement to "scroll through various products."

Source: Meta Business Help Center, Article ID: aBuv9A3t9aZ1fG5.

3. Meta Business Help Center, "About slideshow ads": This source describes slideshow ads as using "motion, sound and text to tell your story" by turning images or video clips into a video ad. It does not mention any interactive scrolling capabilities for the user, differentiating it from an Instant Experience with a carousel.

Source: Meta Business Help Center, Article ID: 611713692245167.