C is the answer
:) for your question (im writing extra cause answer is too small)
The balls move randomly.
Because gas molecules are known for their movement and the above statement says “to model the movement”
A tool mark in a door frame contains small particles; The best way to collect them while leaving them in context is by making a cast. A tool mark is any impression, scratch, or abrasion made when contact occurs between a tool and an object. Abrasion marks are the tool marks made when surfaces slide across one another; objects such as pliers, knives, axes, or a gun barrel make this type of mark. There are three types of tool mark impressions; namely; indentation, abrasion, and cutting marks.
Binary fission is for reproduction of a cell by division into two equals parts
