Final answer:
The type of risk being introduced to the project is Technical risk.
Step-by-step explanation:
The type of risk being introduced to the project when adding a feature using an unfamiliar development framework is Technical risk. Technical risk refers to the potential for difficulties or problems arising from the technical aspects of a project, such as the use of new tools or frameworks. In this case, using an unfamiliar framework introduces the risk of encountering technical challenges and obstacles that may affect the successful implementation of the feature.
For example, if the team is used to working with one development framework and suddenly switches to a completely different one, they may face difficulties in understanding the new syntax, framework limitations, or compatibility issues with existing code. These challenges can lead to delays, errors, or the need for additional resources to overcome technical hurdles.