Final answer:
The word 'vacancy' corresponds to the option 'Opening' as it signifies an available position or space, akin to an opening. Option a
Step-by-step explanation:
The word "vacancy" best matches with the option (a) Opening. A vacancy refers to an unoccupied position or available space, similar to an opening. On the other hand, closure means the act of closing something or the fact of being closed, which is the opposite of a vacancy.
An obstacle is something that blocks one's way or prevents or hinders progress, and a contract is a legally binding agreement between two or more parties. Therefore, "opening" is the term that conveys a similar meaning to a vacancy, as it denotes an available opportunity or position that could be filled. Option a