Some tips to follow to write this informal letter are:
- Address of the sender and receiver (if the receiver is abroad)
- Salutation
- Body of the letter telling your friend your travel plans
- State why you would want to travel
- Mention the purpose for your travel and your preferred destination
- Conclusion
<h3>What is an Informal Letter?</h3>
This refers to the type of letter that is written to a close friend or associate and uses an informal tone.
Hence, based on the fact that the letter is an informal one, you are allowed to joke around, but remember why you are writing this letter and state it.
Read more about informal letters here:
brainly.com/question/18879087
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The flow is like the fluency in an essay, so it's the arrangements and transition words to allow it to be told smoothly. 
Answer:<span>b. the use of transition words between supporting paragraphs</span>
        
                    
             
        
        
        
Answer:
To make a better and informed decision
Explanation:
The main reason why the multiple alternatives are searched to take a single decision is "To make a better and informed decision." 
Given that alternative decisions are expected to be drawn from a wide range of experience, experimentation, and research knowledge. These alternatives are then assessed and evaluated before reaching a final decision.
Hence, in this case, the main reason for conducting an alternative before making a decision is to "Experience, experimentation, and research."
 
        
             
        
        
        
Answer:
an
Explanation:
The word idea starts with a vowel and the adjective needed shouldn't also end with a vowel. And in this case, you can't use a because it's a vowel. So, you use an.
 
        
                    
             
        
        
        
I believe it would be Evaluation, since we are evaluating the differences of two diets and their benefits.