Fluid is a substance that:a. flows.b.has the same shear at a point regardless of its motionc.always expands until it fills any containerd.cannot remain at rest under action of any shear forcee.cannot be subjected to shear forces

Fluid is a substance that:

a. flows. b. has the same shear at a point regardless of its motion. c. always expands until it fills any container. d. cannot remain at rest under the action of any shear force. e. cannot be subjected to shear forces.

Step 1: Read the question carefully to understand what is being asked. Step 2: Analyze each option provided and determine if it accurately describes a characteristic of a fluid. Step 3: Option a states that a fluid flows. This is true, as fluids are substances that can flow and change shape. Step 4: Option b states that a fluid has the same shear at a point regardless of its motion. This is also true, as fluids exhibit shear stress and strain, which are independent of their motion. Step 5: Option c states that a fluid always expands until it fills any container. This is generally true, as fluids are known to take the shape of their container and fill it completely. Step 6: Option d states that a fluid cannot remain at rest under the action of any shear force. This is true, as fluids are not able to resist shear forces and will always deform under such forces. Step 7: Option e states that a fluid cannot be subjected to shear forces. This is false, as fluids can indeed be subjected to shear forces and will exhibit shear stress and strain.

In conclusion, the correct options that accurately describe a characteristic of a fluid are: a. flows. b. has the same shear at a point regardless of its motion. c. always expands until it fills any container. d. cannot remain at rest under the action of any shear force.