Too much logging in the oyamel fir forests could lead to the eastern monarch butterfly going extinct because a. the entire population of the species spends winter in oyamel c. the winters are too cold in oyamel b. the butterflies breed in the oyamel fir trees d. the butterflies feed on the oyamel fir tree

a. the entire population of the species spends winter in Oyamel.

Monarch butterfly cannot survive in extreme climatic conditions. These butterflies spend winter months in Oyamel fir forest of Mexico. Oyamel forest situated in mountain hills provides an ideal climate for their survival. Here, the temperature ranges from 0 to 15 degree Celsius. If the temperature is low, the monarch butterflies uses their fat reserves. The dense canopy of trees in Oyamel fir forest drives heat from the ground at night and protect these butterflies from rain, wind and snow.  The supply of excess of water as in the case of water logging condition can make trees susceptible to diseases and pests. In winter majority of monarch butterfly concentrate over the same region of Oyamel fir forest. Such water logging conditions will make the forest unsuitable for survival and further may lead to extinction of these butterflies.

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers