Here are the answers with explanation:
- performance - This word is needed as a noun to describe what is being offered. It refers to the act of performing or how well something is done.
- ability - Here, the noun form of 'able' is needed to refer to different levels of skill or competence.
- academically - An adverb is required here to describe the child's giftedness in an academic context.
- difficulties - This word is needed as a noun to describe learning challenges.