Explanation:

- Invade means to enter a place forcefully or aggressively with intent to occupy or control.

- Option 1: Seize refers to taking hold of something suddenly or forcibly, similar in intent to invade.

- Option 2: Assault involves a sudden, violent attack, aligning with aggressive behavior like invading.

- Option 3: Attack indicates an aggressive and violent action against someone or something, akin to invasion.

- Option 4: Surrender is the act of giving up or yielding, typically symbolizing a withdrawal or relinquishment, which is opposite to the aggressive act of invading.

- Correct Answer: Surrender