To solve this problem, we need to identify the major causes of biodiversity loss from the given options. Let's analyze each option:$\newline \bullet$A. Over exploitation:$\newline$ - Over exploitation refers to the excessive use of species and natural resources, leading to their depletion.$\newline$ - It is a major cause of biodiversity loss as it can lead to the extinction of species.$\newline \bullet$B. Co-extinction:$\newline$ - Co-extinction occurs when the extinction of one species leads to the extinction of another species that depends on it.$\newline$