The correct answer is D. bondage.
Bondage is the state of being a slave. Slaves are people who are owned by other people and are forced to work for them without pay. They are not allowed to leave their owners or to refuse to work. Slaves are often treated very poorly and are subjected to violence and abuse.
Ablution is the act of washing oneself, especially in a religious ceremony. Pilferage is the act of stealing small amounts of money or goods. Agreement is a formal arrangement between two or more people or groups.
The other options are incorrect because they do not refer to the state of being a slave.