“Lightning Flow” is the umbrella term used by Salesforce to refer to two core declarative automation tools:

Flow Builder: The primary visual interface for creating flows of all types, such as screen flows and autolaunched flows.

Process Builder: Although being phased out, it has historically been part of the Lightning Flow suite as a tool for declarative automation based on field changes and conditions.

Incorrect Options:

A. Lightning Experience is the UI, not part of the automation toolset.

B. Approvals are not part of the Lightning Flow product family. They are a separate automation feature in Salesforce.

D. Lightning App Builder is a UI layout tool, not related to process automation.

Reference Extracts from Salesforce Process Automation Documents / Study Guide:

“Lightning Flow includes Flow Builder and Process Builder for creating automated processes.”