Final answer:
The ionosphere resides mainly within the thermosphere, while the ozonosphere resides within the stratosphere.
Step-by-step explanation:
The statement is true. The ionosphere is a region of the Earth's atmosphere that extends from about 48 kilometers above the surface to the edge of space. It mainly exists within the thermosphere, which starts just above the mesosphere. On the other hand, the ozonosphere, also known as the ozone layer, resides within the stratosphere, which is the layer above the troposphere.