BOTANY

Detailed explanation-1: -A primary forest is a forest that has never been logged and has developed following natural disturbances and under natural processes, regardless of its age.It is referred to “direct human disturbance” as the intentional clearing of forest by any means (including fire) to manage or alter them for human use.

Detailed explanation-2: -The DNR defines old growth forests as forests that have developed over a long period of time, essentially free from catastrophic disturbances. They contain large, old trees of long-lived species that are beyond traditional rotation (harvest) age.

Detailed explanation-3: -The correct answer is Short Circuit Fire. A short circuit fire is not a natural disaster.

Detailed explanation-4: -Mature Forests contain mainly coniferous trees, generally more than 60 years of age. In the Discovery Islands mature forests on productive sites develop old forest characteristics by about 140 years. Some forests that appear mature may actually be old forests growing on poor sites, where trees never grow very large.

Detailed explanation-5: -Forest fire, also known as bushfire or vegetation fire, is any uncontrolled and unprescribed combustion or burning of plants in a natural context such as a forest, grassland, brushland or tundra that consumes natural fuels and spreads due to environmental conditions (e.g. wind and topography).