In our present human-made decline in biodiversity, five causal factors account for most extinctions: habitat destruction, habitat fragmentation, overkill, invasive species, and secondary effects cascading through an ecosystem from other extinctions.
(five causal factors; account; for most extinctions; L:In our present human-made decline in biodiversity)
five causal factors
account
for most extinctions L:In our present human-made decline in biodiversity