Final answer:
The correct option is :3) both of these.
A changing electric field induces both a changing magnetic field and an electromagnetic field, as described by Maxwell's equations.
Step-by-step explanation:
A changing electric field induces a changing magnetic field. This is a cornerstone of electromagnetic theory and is encapsulated in Maxwell's equations. Specifically, this reciprocal relationship is described by one of Maxwell's equations which states that a changing magnetic field induces an electromotive force (emf) and thus an electric field, and vice versa.
A magnetic field is not only generated by moving charges, but also by changing electric fields, which can be currents that in turn generate their own magnetic fields. Meanwhile, an electromagnetic field is a combined description of electric and magnetic fields which are interrelated and propagate as electromagnetic waves. In essence, the changing electric field results in a dynamic magnetic field, which is a component of an electromagnetic field.
Therefore, the correct answer to the question is that a changing electric field induces: both a changing magnetic field and an electromagnetic field (option 3).