Television advertisement.
bribes n advertising
Advertising
The most costly items in a typical campaign budget today are media expenses. Television and radio ads are the most expensive. The signs that the candidate might place around a region can also become expensive.
The most expensive item in a typical campaign budget is the media aspect. Television, posters, and other forms of campaigning through media are these.
That would be television advertising.
Strategy is the single most important factor in a political campaign. The right strategy can survive a mediocre campaign, but even a brilliant campaign is likely to fail if the strategy is wrong.
money
joining a political party
if you take the second letter of each item..it spells out "what is the most costly item in the tower". Go to the hidden tower and find it
The most expensive item in a typical campaign budget is the media aspect. Television, posters, and other forms of campaigning through media are these.
volunteering for a political campaign engaging in civil disobedience
what is the most costly item in the hidden tower? http://www.thedailyneopets.com/articles/hidden-tower-items/
Primary campaign literature
The superlative for costly is "most costly" or "costliest."