What must be observed when several motorcycles are travelling together in a group?

Your answer is correct because it includes crucial points about riding in a group. The requirement to ride in a staggered formation on straight roads helps maintain safety by ensuring that motorcyclists can react to hazards more effectively, providing better visibility and space.

Additionally, the guidance that the group's driving style should accommodate the least experienced rider emphasizes the principle of safety in numbers. This means that the entire group should adhere to a pace and style that considers the abilities of all members, especially those who may not be as confident or skilled.

However, option three, which states that the group must remain together in every traffic situation, is not correct. While it’s important for groups to stick together when safe, there are scenarios (like heavy traffic or difficult road conditions) where splitting up may be necessary for the safety of the group. The law emphasizes safety over group integrity, allowing flexibility based on the situation at hand. Understanding these nuances is essential for riding responsibly in a group setting.