11. It is an environmental factor which affects the life cycle of some organisms.
a. climate change
b. larva stage
c. pupa stage
d. metamorphosis

12. Which is NOT an environmental factor that affects the life cycle of plants?
a. nutrients
b. water
c. sunlight
d. germination

13.it is the removal or cutting of trees in the forest.
a.pollution
b.deforestation
c.el niño
d.extinction

14.what happens when the throw garbage into the rivers.
a.there will be more fish
b.the water will become clear
c.there will be less fish
d.there will be no flood

15.why are the ice cap in north pole melting?
a.the polar bears ate the ice
b.the temperature in the north pole rises because of the global warming.
c.the winds melting the ice
d. the earth is spinning ​