Biology

The correct answer is: C.Hormones.

Explanation:

Hormones are used for long-distance signaling in both plants and animals. They are chemical messengers that travel through the bloodstream in animals or through vascular systems in plants, allowing communication between distant cells and tissues.

Here's why the other options are incorrect:

A.Local regulators: These are signaling molecules that act over short distances, such as growth factors or prostaglandins.