Hi, This seems to me like hard homework for someone who is 9. You are native speakers of English, aren't you? Hope sombody can help us with sons home work (below) he does understand some of the differences just not sure where to start when writing it down!!
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Anonymous1a. The sphinx which is in Egypt, is an ancient monument.
There are several Sphinx's located all over the world. Maybe some are old and some are new. But the one in Egypt is an ancient monument.
1b. The sphinx, which is in