List ways in which a non-native species might arrive in a
new ecosystem.

Explanation: Non Native species come in many ways one way is by boat or some other form of transportation where whether its a plant or animal is either brought on purpose legally, brought illegally, or brought by accident. Like maybe a disease  someone didn't know they had or a bug or other animal sneaks on undetected

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation:

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this