Answer:The answer is A. hand lens.A hand lens (also known as a magnifying glass) is specifically designed to magnify small objects, allowing for close observation of tiny creatures, plant parts, and other small details.Let's look at why the others aren't suitable: * B. Hand span: This is a unit of measurement using the spread of your hand, not an observation tool. * C. Kitchen tongs: These are used for gripping and moving food, not for observing small details. * D. Toothpicks: These are small, thin sticks used for picking up small food items or for cleaning, not for magnification or observation.