Explanation:

Water exists in three different states: solid, liquid, and gas. Each state has its own unique characteristics and properties. In this case, we are looking for the state of water where the molecules remain in somewhat definite positions with relatively little motion and vibrate back and forth to a limited extent.

Ice:

When water molecules freeze, they arrange themselves in a specific pattern, forming a solid state known as ice. In ice, the water molecules are held together by strong intermolecular forces, causing them to be tightly packed and relatively immobile. The molecules in ice have a fixed position and can only vibrate back and forth in their fixed positions. This limited motion is due to the low amount of energy in the system at lower temperatures.

Water:

In its liquid state, water molecules have more freedom of movement compared to ice. They are still attracted to each other, but the intermolecular forces are weaker, allowing the molecules to move more freely. However, the molecules in liquid water are not in definite positions and can move around and interact with each other more easily than in the solid state.

Steam:

When water is heated to its boiling point, it undergoes a phase change and becomes a gas, known as steam. In the gaseous state, the water molecules have the most freedom of movement. They are not held together by intermolecular forces and can move independently of each other. The molecules move rapidly and have a high amount of kinetic energy. They can travel far apart from each other and fill the entire space available to them.

Plasma:

Plasma is the fourth state of matter, which is composed of highly ionized particles. It is usually found at extremely high temperatures or in the presence of high-energy electric fields. Plasma is often referred to as an "ionized gas" because the atoms or molecules in it have lost or gained electrons, resulting in the formation of positive and negative ions. Plasma does not exhibit the characteristics mentioned in the question, as its particles are highly energetic and do not remain in definite positions.

Hence, the correct answer is option 'C' - Ice.

Ice