Final answer:
In order to determine whether an object will float, you need to compare the densities of the object and the fluid it is placed in.
Step-by-step explanation:
In order to determine whether or not an object will float, you need to compare the densities of the object and the fluid it is placed in. Density is defined as the mass per unit volume of a substance. If the density of the fluid is greater than the density of the object, the object will sink. If the density of the object is greater than the density of the fluid, the object will float.
For example, if you have a wooden block with a certain density and place it in water (which has a lower density), the block will float because its density is lower than that of the water. On the other hand, if you place a lead block with a higher density than water in the same fluid, it will sink.
Therefore, option C is correct: if the density of the fluid is less than the density of the object, the object will float.
Learn more about Floatation