Which of these is an example of an idiom? apex a. it was fun to watch my baby sister play in the field of grass. b. i wasn't sure why he was angry. his mood came out of left field. c. the cat seemed angry. she hissed every time i came near. d. my brother and i got into a huge fight. my best friend had to stop us.

The correct answer is B. The sentence is using the idiomatic expression: "His mood came out of left field".

An "idiom" is a group of words which, if used in a different context, considering the individual definition of each an every word included in such idiomatic expression, would have another connotation; but once it is considered a local idiom, it shall be understood with its particular meaning.

In this case the idiom: "His mood came out of left field" means that "his anger was completely unexpected or strange."

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i believe the answer(s) would be all but external conflicts.