https://docs.microsoft.com/en-gb/azure/cognitive-services/welcome?ocid=AID2339762_TWITTER_oo_spl100000827964250
https://powerapps.microsoft.com/en-us/blog/cognitive-services-with-powerapps-using-custom-connectors/

Explanation:
Box 1: Yes
Chatbots built with Power Virtual Agents will understand and display content that's locally relevant to the user. Localized handling and formatting are based on the user's browser locale setting, and include the following elements within a chat conversation:
Date and time

Numbers

ZIP or postal code

Currency

Speed

Box 2: Yes
Custom entities:
The prebuilt entities cover commonly used information types, but on some occasions, such as when building a bot that serves a specific purpose, you'll need to teach the bot's language understanding model some domain-specific knowledge.
For instance, let's say you want to build a bot for an outdoor store. In this case, you'll need to teach the bot to acknowledge the "outdoor gears product" category in a dialog.
Reference:
https://docs.microsoft.com/en-us/power-virtual-agents/data-location
https://docs.microsoft.com/en-us/power-virtual-agents/advanced-entities-slot-filling

Explanation:
https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/create-site-map-app

Explanation:
Box 1: Trigger phrase
Identify keywords or questions and relate them to issue.
What are trigger phrases in Copilot Studio
Trigger phrases train your copilot's natural language understanding (NLU) model.
Trigger phrases are configured at the topic level and indicate to the copilot for what typical user utterances a specific topic should be triggered.
Trigger phrases typically capture the way an end-user would ask about a problem or issue. For example, "problem with weeds in lawn" Box 2: Variable Store a response that a user enters for later use.
Box 3: Entity
Identity a specific type of information from a user response.
Reference:
https://learn.microsoft.com/en-us/microsoft-copilot-studio/guidance/trigger-phrases-best-practices