Ella has suffered a head injury. she is no longer able to form new long-term memories. she is suffering from

Anterograde amnesia.

Explanation:

Anterograde amnesia may be defined as the medical condition in which the creating the memories ability is lost in the individual. Retrograde amnesia is different from this amnesia as in the retrograde amnesia the old memories are lost in the individual.

The head injury can cause the anterograde amnesia. Ella has lost the ability to form the long memories. She is suffering from the anterograde amnesia. As the condition is associated with lost of memories and mainly occur due to injury in hippocampus region of brain.

Thus, the answer is anterograde amnesia.

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