Correct Answer: Support

Solution : The first option is the correct choice.

An advocate is someone who publicly supports or recommends a particular cause or policy, and support aligns closely with this concept, as it also means to give assistance or approval to something.

The meanings of the other options are as follows:

• Justice is the quality of being fair and reasonable.
• Forever is an adverb meaning for all time; lasting or permanent.
• Experience is the practical knowledge, skill, or involvement gained over time in a particular activity or event.

Therefore, the correct answer is support.