What is the main purpose of a microscope?

The main purpose of a microscope is to enhance the vision of small objects. Microscopes are specifically designed to magnify tiny structures that are not visible to the naked eye, such as cells, bacteria, and minute details of various specimens. This magnification allows scientists and researchers to study the morphology, behavior, and other characteristics of small entities in detail, which is essential in fields such as biology, medicine, and materials science.

The other choices do not relate to the primary function of a microscope. Measuring temperature involves thermometers, analyzing chemical reactions relates to techniques and instruments in chemistry, and observing weather phenomena typically uses meteorological tools like barometers and anemometers. These tools serve very different purposes and are not associated with the magnification capabilities of a microscope.