Which of the following is considered a variable

Size
Collisions
Particles
Lights

All of the options listed (Size, Collisions, Particles, Lights) can be considered variables, as they can vary or change in different situations or scenarios.

In the context of computer programming, a variable is a symbolic name that represents a value which can vary during the execution of a program. From the list provided, "Size" can be considered a variable as its value can be different depending on the specific situation or requirement. The other options, "Collisions," "Particles," and "Lights," do not inherently represent values that can change or be assigned different values during program execution, so they may not be considered variables in this context.

To determine whether something is considered a variable or not, we can look at its characteristics. A variable is a symbol or a value that can change or vary during the execution of a program or formula. It can hold different values at different times.

Out of the options you provided, "Size" is a variable. In programming or mathematics, "Size" can represent a value that can change, such as the size of an object, a file, or a collection. For example, you can have a variable called "size" that represents the size of an array in a programming language.

On the other hand, "Collisions," "Particles," and "Lights" are not inherently considered variables. "Collisions" typically refers to the interactions between objects in a physical or virtual space, but it is not something that changes on its own. Similarly, "Particles" and "Lights" are usually used to describe specific elements or features rather than variables.

It's important to note that the categorization of these terms as variables may depend on the context in which they are mentioned. In a different context, any of these terms could potentially be considered variables.