Final answer:
Spontaneous mutations occur without environmental influence during DNA replication, whereas induced mutations result from external factors like ultraviolet light.
Step-by-step explanation:
Errors in DNA replication are examples of spontaneous mutations, while mutations caused by ultraviolet light are induced mutations. The correct answer is a) Spontaneous; Induced. Spontaneous mutations are the result of natural reactions taking place within the body, like the rare errors made by DNA polymerase during DNA replication. On the other hand, mutations occur because of exposure to environmental agents such as chemicals, UV rays, x-rays, or other environmental factors that cause damage to the DNA sequence.