下列经济成分中，属于非公有制经济的是（    ）

①个体经济    ②私营经济      ③外资经济     ④集体经济

    It is March 12th. It's Tree Planting Day. There are many people on the hills. They're planting trees. People plant many trees today. Plants are important to us. They can make food from the air, water and sunlight. But animals and people can't do so. Animals and people can get food from plants. Without plants, life will not go on, Plants make the air clean. They can keep water from flowing away(流失). They can stop wind from blowing up sand and earth. But in some places people are cutting down too many trees. This brings about floods and sandstorm. Now more and more people know that plants are important. They will plant more trees and grow more plants. They will try to protect the trees.

新西兰是大洋洲最美丽的国家之一，被誉为“绿色之国”。读图文资料，回答问题。

材料一：对外贸易在新西兰经济中占有重要地位。中国已是新西兰最大的贸易伙伴，新西兰从中国进口的产品以服装、电信设备、电子数据处理与办公设备、金属制品、化学成品等为主；新西兰出口到中国的产品主要有肉类、鱼类、水果、乳制品、毛毯、食品、造纸、木材等。

材料二：畜牧业是新西兰农业的主要部门。第三产业以金融业、进出口贸易、通信邮电、旅游业为主。