In the wild, Mick and his friends use a unique communication system called the River Post Office. Without phones or email, they rely on an ancient practice of using knots to send messages. Each person has a unique calling card made from natural materials. Mick leaves a message for his friend Norm, hoping for help to cross the river. Although slower, this system is reliable, with friends checking their mailbox every few days.

Why do Mick and his friends need an alternative communication system?

• They are conducting an experiment on communication.

• They want to preserve ancient traditions.

• They prefer traditional methods over modern technology.

• They live in a remote area without access to phones and email.

What is the primary method of communication used by Mick and his friends?

• Smoke signals

• Knot systems

• Morse code

• Carrier pigeons

How are messages encoded in the knot system?

• By using different colors of rope

• By tying a series of different knots

• By using various lengths of rope

• By attaching symbols to the rope

What does Mick use to represent his calling card?

• A leaf

• A piece of stone

• A piece of bark shaped like a barefoot

• A feather

Who is Mick trying to contact with his message?

• His family

• A local guide

• His friend Norm

• A fellow traveler

What indicates that there is a message in the 'Inbox'?

• A flag is raised

• A light is turned on

• A stick is placed in a specific position

• A bell is rung

How often do Mick and his friends check their mailbox?

• Every day

• Once a month

• Once a week

• Every few days