The phrase 'the ______ laws of physics' describes laws that are unchanging.

The phrase 'the ______ laws of physics' describes laws that are unchanging.

• A. Immutable
• B. Extant
• C. Proclivity
• D. Sobriquet

Answer: (A)

When describing laws as never changing, you want a word that means not subject to alteration. Immutable fits perfectly because it conveys permanence and invariability—that these laws remain constant across time and the universe. In the phrase “the immutable laws of physics,” the sense is that these laws are universal and unchanging. The other options don’t capture that sense. Extant means existing or presently in existence, but it doesn’t imply permanence or invariability. Proclivity refers to a natural tendency or inclination, which has nothing to do with how constant a law is. Sobriquet means a nickname, also unrelated.

When describing laws as never changing, you want a word that means not subject to alteration. Immutable fits perfectly because it conveys permanence and invariability—that these laws remain constant across time and the universe. In the phrase “the immutable laws of physics,” the sense is that these laws are universal and unchanging.

The other options don’t capture that sense. Extant means existing or presently in existence, but it doesn’t imply permanence or invariability. Proclivity refers to a natural tendency or inclination, which has nothing to do with how constant a law is. Sobriquet means a nickname, also unrelated.