Final answer:
Miller most likely used Safari to log into his school email on his iPhone, as Safari is the default web browser on Apple devices and is optimized for iOS.
Step-by-step explanation:
If Miller logged into his school email account using a browser on his iPhone, the most likely browser he used is Safari. Safari is the default web browser for all Apple devices, including the iPhone. While it is possible to download other browsers such as Chrome, Firefox, or Opera from the App Store, most users typically use Safari for browsing, as it is pre-installed and optimized for iOS devices. Safari integrates seamlessly with the iOS ecosystem, providing an efficient and user-friendly experience for iPhone users.
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