If you are talking about Alfred Wegener, then his Hypothesis was Continental Drift, a Theory that suggested that all the continents were once one large supercontinent, named Pangaea, But drifted apart from each other over a long period of time.
The answer is b) Surveying opinions of fellow classmates
Chemicals produced by bacteria that limit the growth of other bacteria are called antibiotics.
Malluability i think sorry if im wrong