Why is this the answer?

The answer is pea because this amazing riddle is a super fun puzzle that uses a very clever trick with letters and sounds. Let's look at the first two clues to be sure. A little pea is a small, round, green thing that grows in a pod, which is a kind of seed, so the first line, "A seed am I," is completely true! The word "pea" is also spelled with three letters: P, E, and A. This means the second clue, "three letters make my name," is also correct. Everything fits so far! Now, for the part that really makes your brain work: "Take away two and I still sound the same." The word "pea" has three letters. If we take away two letters, we are only left with one letter. Which one is it? The word "pea" is spelled P E A. If you take away the last two letters, E and A, you are left with just the single letter P. Now, say that letter P out loud, just like you would say it in the alphabet. You say "Pee!" The word "pea" and the sound of the letter "P" are twin sounds. They are what we call homophones. That means they sound exactly alike even though they are written in different ways. This riddle is a perfect example of a word puzzle that makes you think about how words look and how words sound. You need to think not just of the object, the little green seed, but also of its spelling and its sound. When you put all the clues together, you find the answer is the pea. It is a wonderful secret hidden right in the letters of the word itself. The riddle is hiding the letter P inside the word P E A, making it seem like you need to find a new word, when really, you just need to find the letter that sounds just like the whole word. This kind of riddle shows how important it is to listen closely to the sounds of letters.