Which two physical physical quantities should be known to calculate density of an object a: mass and volume b: weight and volume c: weight and length d: mass and weight

To calculate the density of an object, the formula is D= M/V. So you have to use Mass and Volume to find the calculation for Density.

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above