Which of the following is true about JavaScript arrays?

JavaScript arrays are versatile data structures that can hold a collection of elements. One of their key characteristics is that they can store elements of different data types within the same array. This means you can have numbers, strings, objects, and even other arrays all contained in a single array. This flexibility allows for the creation of complex data structures, such as an array of objects, making JavaScript arrays highly useful for a variety of programming scenarios.

In contrast to the incorrect options, JavaScript arrays are not limited to a single data type, their size is dynamic and can change as elements are added or removed, and they certainly can be modified after creation. These aspects contribute to the dynamic and flexible nature of JavaScript programming, making it easier to manage collections of data in a way that fits the needs of developers.