Step 2: place avocado, lemon juice and mayonnaise in a bowl. Stir to combine.
Step 4: place 1 wrap on a flat surface. Spread with 1/4 avocado mixture. Top with 1/4 chicken, carrot and spinach. Season with salt and pepper. Roll up wrap to enclose filling. Cut into three pieces. Repeat with remaining wraps, avocado mixture, chicken, carrot and spinach. Serve.