тази кола – колата

книга (a book) ends in -a, so we need to add -та аt the end: книгата (the book)

вечер (an evening) is a feminine noun, so we need to add -та аt the end: вечерта (the evening)

стая (a room) ends in -я, so we need to add -та аt the end: стаята (the room)

история (a story) ends in -я, so we need to add -та аt the end: историята (the story)

жена (a woman) ends in -а, so we need to add -та аt the end: жената (the woman)

снимка (a photo) ends in -а, so we need to add -та аt the end: снимката (the photo)

храна (food) ends in -а, so we need to add -та аt the end: храната (the food)

кутия (a box) ends in -я, so we need to add -та аt the end: кутията (the box)

улица (a street) ends in -а, so we need to add -та аt the end: улицата (the street)

къща (a house) ends in -а, so we need to add -та аt the end: къщата (the house)