ANSWER FAST PLS IM BEGIN YOU AND ALSO PLS DONT USE MY FOR POINTS I ACTUALLY NEED HELP What is responsible for the unusual ecosystem of the highlands?

rivers and river movements

volcanoes and volcanic activity

oceans and ocean currents

plants and plant growth

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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ok, but what is your question? as soon as you tell me i will answer your question : )