ANSWER
b. liquid
EXPLANATION
For each of these options, their volume and shape characteristics are:
Solids:
• Definite volume
,• Definite shape
Liquids:
• Definite volume
,• No definite shape
Plasma:
• No definite volume
,• No definite shape
Gases:
• No definite volume
,• No definite shape
Liquids, gases, and plasma take the shape of the container.
Hence, the state of matter that has a definite volume but no definite shape is liquid.