Democracy is defined as a system of government by the whole population, distinguishing it from other forms.

'Apathy' means a lack of interest or concern.

'Ephemeral' means lasting for a very short time.

Metamorphosis refers to a gradual change in form or structure, often used in biological contexts.

'Meticulous' means very careful and precise in detail.

'Nostalgia' means a feeling of longing for the past.

'Quintessential' means the most perfect or typical example of a quality.

Rhetoric is the art of effective or persuasive speaking or writing, distinguishing it from other language arts.

A playwright is specifically a person who writes plays, making it the correct definition.

A novel is a type of written work that tells a story, distinguishing it from poems, essays, and articles.

An ocean is defined as a vast body of salt water, distinguishing it from lakes, rivers, and ponds.

An artist is a person who creates art, making it the correct match among the options.

An architect is specifically someone who designs buildings, distinguishing them from engineers and builders.

A programmer is specifically someone who writes computer programs, matching the definition.

Nostalgia is defined as a feeling of longing for the past.

'Ubiquitous' means existing everywhere at the same time.

An architect is specifically trained to design buildings, which matches the definition provided.

Cacophony is defined as a harsh, discordant mixture of sounds.

'Sycophant' refers to a person who acts obsequiously towards someone important.

'Ephemeral' refers to something that lasts for a very short time.

Euphoria is defined as a state of intense happiness and excitement.

Serendipity is defined as a fortunate accident or discovery.

'Apathy' refers to a lack of interest or concern.

Disclosure refers to the act of making something known, contrasting with concealment and suppression.

Recycling refers to the process of converting waste into reusable material, making it the correct definition.

Psychology is the study of the mind and behavior, making it the correct definition.

An astronomer is specifically someone who studies celestial bodies, making it the correct match.

A novel is a type of written work that tells a story, making it the correct match.

The moon is the natural satellite of the Earth, making it the correct match.

Anthropology is the study of human societies and cultures, making it the correct match.