i took a test and 16 was wrong, the correct answer is actually 8 because you are doubling the sizes so it would be 4 x 4 x 2. which is 32. if we go back to what thenormal box sizes volume was, its 4. 32/4 is 8 :)
Major threats to freshwater fishes and other freshwater biodiversity, include: habitat modification, fragmentation, and destruction; invasive species; overfishing; environmental pollution; forestry practise; and climate change.