Choose the alternative which best expresses the meaning of the Idiom/Phrase.
He is a man of straw

Weak person

The best alternative that expresses the meaning of the idiom "He is a man of straw" is Weak person.

The idiom "a man of straw" is a metaphor that refers to a scarecrow. Scarecrows are made of straw, which is a weak material. They are also easily knocked over, which is why they are used to scare away birds.

In the same way, a "man of straw" is someone who is weak or easily defeated. They may be physically weak, or they may be mentally weak. They may also be easily manipulated or persuaded.

The other alternatives do not accurately reflect the meaning of the idiom. A thin person is not necessarily weak, and an artificial person is not necessarily weak either. An unreasonable person may be weak, but they are not necessarily a "man of straw."