Why do solids maintain their shape, whereas fluids do not?
a. because the molecules in solids maintain a regular pattern and move very rapidly.
b. because solids are denser than fluids.
c. because solids are under greater pressure than fluids.
d. because the molecules in solids maintain a regular pattern and only vibrate, or move very slowly.

Option (d) is the correct answer.

Explanation:

In solids, the molecules are held more tightly due to the existence of strong intermolecular forces of attraction between its particles.

Hence, they have a definite shape and volume. So, these molecules are arranged in a regular pattern and they are able to vibrate at their position.  

On the other hand in liquids, molecules are slightly away from each other as they are held by less strong intermolecular forces of attraction. Hence, liquids do not have a definite shape but they tend to occupy the shape of container in which they are placed.

Thus, we can conclude that solids maintain their shape, whereas fluids do not because the molecules in solids maintain a regular pattern and only vibrate, or move very slowly.

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

2b2t

explanation:

2b2t