Answer:
Politicial Parties are a type of organization that organizes/orders individuals to enter/complete elections
They exist for multiple reasons, first of all bringing people together who have some of the same ideas and opinions
The main political parties in the US are the democratic, and republican parties'
They are different because they both have different opinions on LGBTQ, Immigration, climate change, health, and more.
Note: My spelling may be incorrect and I suggest editing my answers