Place the letters in the puzzle so that each row and each column contains a word.

Place the letter "e" in the marked place.

Great! A word appears in a row - "area", and in a column - "nest"

Now place the letter "t" to create the word "most" in that row, and the word "eats" in that column.

Good job! Now place the final letter "n" to create "iron" in the column, and "ants" in the row.