Which of the following objects is likely to have the least mass?

a. a marble
b. a soccer ball
c. a watermelon
d. a basketball

To determine which of the objects is likely to have the least mass, we need to consider their size and composition.

To find the answer, you should compare the objects and choose the one that is generally smaller and made of lighter materials. Here is the breakdown of each object:

a. A marble is typically small and made of stone or glass. It is relatively lightweight compared to the other options.

b. A soccer ball is larger than a marble and is usually made of synthetic materials, such as leather or synthetic leather, with an inflated rubber bladder inside. It is heavier than a marble.

c. A watermelon is significantly larger than both a marble and a soccer ball. It is a fruit filled with water, which can make it relatively heavy.

d. A basketball is similar in size to a soccer ball and is also made of synthetic materials. However, it usually has more weight due to its thicker construction and additional layers.

Based on these descriptions, it is likely that the marble would have the least mass out of the given options.

To determine which object is likely to have the least mass among a marble, a soccer ball, a watermelon, and a basketball, we can consider their typical sizes and densities. Typically, a marble is the smallest and lightest object among these options, so it is likely to have the least mass. Therefore, the answer is a. a marble.