Which of the following is a very small syringe used with a hollow needle for injections into or under the skin?

The hypodermic syringe is designed specifically for the purpose of delivering medications or other substances into or beneath the skin. It consists of a cylindrical barrel and a plunger, which allows for precise control of the volume being injected. The hollow needle attached to the syringe ensures that the medication can be administered efficiently and safely at the desired site. This tool is widely used in both human and veterinary medicine due to its effectiveness in delivering various forms of injections, such as vaccines, anesthetics, and other therapeutic drugs.

The other options are used for different purposes. A balling gun is typically used for administering pills or boluses to animals, not for injections. An IV tube is designed for delivering fluids or medications directly into the bloodstream but does not imply a syringe or needle component on its own. Clamping forceps are surgical instruments used to occlude blood vessels or tissue and are not associated with injections. Each of these tools serves important functions in veterinary medical practices, but the hypodermic syringe is the only one among the choices that specifically fulfills the requirement for injections under or into the skin.