Correct Answer: Assault

Solution : The correct choice is the first option.

Explanation: The word bulwark refers to a defensive wall or structure, serving as protection or defence. On the other hand, assault also refers to an offensive action, indicating an aggressive attack or approach. The key here is understanding the difference between defence (bulwark) and offence (assault).

The meanings of the other options are as follows:

• Rampart : It refers to a defensive wall or fortification.
• Bastion : It denotes a stronghold or a fortified place.
• Fortification : It means strengthening or reinforcing a place against attack.