Paragraph 3 for your letter will describe and explain what you have done since you washed up on the island. You may include:
What you did first
The other people who are with you
The jobs you have done since arriving
How you elected your leader
How difficult it has been since you arrived.
Remember you should aim to include powerful verbs- doing words that add movement (remember to dance them to see if they work) and explicit adjectives – describing words that are specific and effective (no nice, lovely, bad, horrible).