If anyone know this question's answer please help me for understanding. I have confusion about this.
“Engagement partner” is the technical term used (in ISAs) for the partner responsible for a particular engagement. In practice he may well be referred to as “the audit partner”.
“Audit partner” is a general term that might be used to distinguish a partner in a firm who is responsible for audit clients – as opposed to a “Tax partner”.
"Engagement quality control reviewer" is a partner in the firm (NOT the engagement partner) responsible for evaluating the significant judgments and conclusions of the engagement (e.g. audit) team.
Thank you Kim Smith