The crossword solution for the term 'Plant Pet' is CHIA, which is a four-letter word. CHIA is a type of flowering plant in the mint family, native to Central and South America. It is most commonly known for its edible seeds, which are high in omega-3 fatty acids, fiber, and antioxidants. CHIA seeds can be eaten raw or soaked in water to form a gel-like substance. They are often used as a topping for yogurt, oatmeal, and smoothies, or as an ingredient in baked goods. CHIA plants are also popular as houseplants due to their attractive foliage and low maintenance requirements.