Second left-behind refers to left-behind children in rural areas who are moved to cities by their parents and are surrounded by strangers without friends or playmates because their parents are busy with their work every day.
According to the above definition, which of the following is second left-behind?
In a new district street food market, xiao Ying, who was picked up by her parents in the city, helped her grandmother collect money from the vegetable seller every day. When there were no customers, she would squat on the ground and read comic books