Making the right call: when to use a page or a dynamic template

You are tasked with creating a feature that allows users to search for products based on specific criteria (e.g., price range, category, color). Is this scenario function-based or appearance-based in WordPress development?

You are requested to implement a custom-designed theme for a website that reflects the branding guidelines of a company, including specific fonts, colors, and layout. Is this scenario function-based or appearance-based in WordPress development?

You need to integrate a payment gateway to enable online transactions on an e-commerce website. Is this scenario function-based or appearance-based in WordPress development?

You are required to optimize website performance by implementing caching mechanisms and reducing page load times. Is this scenario function-based or appearance-based in WordPress development?