Translation:Many communities are against exploration.
I'm not a native, but as no one else has replied... It looks like it does mean both:
I was marked wrong for "Many communities are opposed to the exploration." I don't know whether to report it because I don't know what it thinks is wrong. I don't know if it didn't like my including the definite article, which gives the sense that it is a particular case of "exploration" the communities are against, or if it didn't like my choice of verbs. All I can do is try some other combinations and see which get rejected. And I can never be sure the instruction I'm given by this machine is correct. In this AI world I very much miss having a real teacher.