4. complete the following sentence with the best phrase below removing just one species from an ecosystem would
a. would have no effect,because it is just one species of many
b. would have little effect,unless it was a keystone species(i picked this
c. would have a negative effect,unless it was an endangered species
d. would have a negative effect,especially if it was a keystone species

5.which of the following could help reduce loss of biodiversity ?
a. increasing construction of tall buildings
b. increasing farming operations
c. increasing conservation measures(i pick this
d. increasing the human ecological footprint

7. how is biodiversity related to human activities that use natural resources
a. biodiversity decreases as humans use natural resources wisely
b. biodiversity decreases as humans limit their use of natural resources
c. biodiversity increases as humans deplete natural resources
d. biodiversity increases as humans develop sustainable ways of using natural resources