Read the situation give below and pick answer to the questions:
Coffee
Aswini returned home after shopping and prepares coffee. She adds coffee powder and sugar to the hot water and stirs well. Aswini then pours some milk into the mixture. She filtered it and tasted, it was delicious and tasted uniform throughout.
In an unfiltered cup of tea, the tea powder particles are visible and gradually settle down at the bottom when the mixture is left undisturbed.
What does this behaviour suggest about the solubility and nature of tea powder in water?