Concept:Nsibidi is an indigenous system of symbols used by the Efik people as a form of writing.
Explanation:The Efik Kingdom, located in southeastern Nigeria, developed Nsibidi to record ideas and communicate.
Nsibidi symbols are mainly ideographic, meaning each symbol represents an idea or concept rather than a single sound.
Some scholars also suggest that Nsibidi includes logographic elements, where symbols may represent whole words.
This makes it different from ordinary alphabets and shows the advanced intellectual culture of the Efik people.
The other options are not correct: Hieroglyphics belong to ancient Egypt, Cuneiform to Mesopotamia, and Ajami is a writing system based on Arabic script used in West Africa.
Answer:Nsibidi (Option D).