Reasoning

As Microphone makes sound louder similarly Microscope makes the object magnified.

First leads to the second.

First indicates the lack of second.

The words in pair are synonyms of each other.

As Silence is opposite to noise, similarly Baldness is opposite to Hair.

First refers to the act of subduing or doing away with the second.

Pastoral describes rural areas; metropolitan describes urban areas.

Upon harvesting, cotton is gathered into bales; grain is gathered into shocks.

Money is kept in a bank. Similarly, arrows are kept in a quiver.