SYNOPSIS
Yn y bennod yma byddwn yn darganfod beth yw'r pethau defnyddiol mewn natur. Discovering which things in nature are useful to people, such as how trees help.
Yn y bennod yma byddwn yn darganfod beth yw'r pethau defnyddiol mewn natur. Discovering which things in nature are useful to people, such as how trees help.
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