The correct option is :
↬ has
Step-by-step explanation:
The man has a cane.
When we have a singular noun/pronoun we use "has".
If we have plural nouns/pronouns (or I, you) then we use "have".
For example:
The girl has a puppy.
I have a notebook.
We have an idea.
Hence, the answer is "the man has a cane".