National parks are an important part of our heritage, group of answer choices and they remain pristine and undisturbed because of their park status. but they are endangered by overcrowding, pollution, and in some places, mining. but they are endangered by overcrowding. but they lack any protection from mining, logging, and grazing. but unfortunately exist only in remote inaccessible areas.

"but they are endangered by overcrowding, pollution, and in some places, mining"

Explanation:

Recently government and private institutions have made a great effort to protect different national parks and their natural resources. however the increasing population day after day remains on the needs for more spaces to contruct roads and houses, which lead to the distruction of nature and displacement of its inhabitant, additional the careless use  of products such as plastic and chemicals is cousing a huge damage in the parks evironment since it affects animals and trees.