1. They advocate the concept of environmental preotection. (佳)
advocate: to support sth publicly (多以人為主詞，人才會提倡ex:政策、宣言, etc)
The group does not advocate the use of violence. 這團體不支持使用暴力。
2. They promote the concept of environmental preotection.
宜改The concept was introduced to promote the sense of environmental protection.
=They introduced the concept to promote the sense of environmental protection.
promote: to help sth to happen or develop 促進 (用某些策略、方法來促進某事)
The committee suggested policies to promote economic growth.
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