Answer:
1st (Right to association)
Step-by-step explanation:
First amendment prohibits any law that can prohibit free exercise of religion, freedom of speech, freedom of the press and right to peacefully assemble or prohibits citizens form petitioning the government to get the grievances redressed .
Freedom of association is related to political party as the freedom of association protects rights of all persons to group together to achieve a common goal, to form and join an association. Non governmental organisation, sporting and professional clubs, political parties and trade unions all fall under the freedom of association.