Complex sentence: Botha has used his art to comment on on the social and political challenges of his time, but he has created works on a variety of themes, including the co-existence of humans with other life forms, creativity, citizenship and lifelong learning.
Split into simpler sentences: Botha has used his art to comment on on the social and political challenges of his time. He also has created works on a variety of themes, including the co-existence of humans with other life forms, creativity, citizenship and lifelong learning.