Which is the greatest threat to survival of large predator species, like mountain lions and tigers

A) loss of other predator species

B) Global climate changes

C) loss of large wilderness areas

D) animal diseases

B) Global climate changes

Explanation:

The greatest threat to the survival of large predator animals such as mountain lions and tigers is the change occurs in climate. Due to climate change, the temperature of the whole world increases. On mountains, the temperature is very low which is favorable for the growth of mountain lions and tiger. But increase occurs in the temperature of these mountain areas due to global warming, these animals die.

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: