Final answer:
Oxalic acid, phytic acid, and tannins are present in foods and can form insoluble compounds with certain minerals, reducing their absorption in the body.
Step-by-step explanation:
Oxalic acid, phytic acid, and tannins have in common their presence in foods and their ability to form insoluble compounds with certain minerals. For example, oxalic acid and phytic acid can form insoluble salts with calcium, reducing its absorption in the body. Similarly, tannins in foods can bind to iron, making it less available for absorption. This is why a diet high in these acids can decrease the absorption of calcium and iron.