Practice question

Renal cortex (C) is the right choice. This sits at the heart of Excretory System: the wording points straight to what is happening in the tissue or organ system. A useful study habit is to ask what the structure or process is for: this is mainly a definition check, and Renal cortex is the standard term or meaning used in Excretory System. That reasoning supports Renal cortex. One solid sentence about why this works is enough for recall — you do not need a long essay for every MCQ. When you practise, cover the choices first, write Renal cortex from memory, then reveal the letter — that habit builds real recall for Excretory System.