Explanation:

There were two major factions within the Jacobins:

• Mountain - The Mountain group, also called the Montagnards, got their name because they sat along the top benches of the Assembly. They were the most radical faction of the Jacobins and were led by Robespierre. They opposed the Girondists and eventually gained control of the club.
• Girondists - The Girondists were less-radical than the Mountain and eventually the two groups came into conflict. Many Girondists were executed at the start of the Terror for opposing Robespierre.