Discuss how humans changed the balance of the park ecosystem. WILL MARK BRAINLIEST

The most common way that humans damage ecosystems is by destroying habitat. For example, we remove trees, change the flow of water, and change grasslands into farms. These practices can lead to local extinctions of species and cause other species to migrate to new areas.

Explanation:

Brainliest?

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.