a.

protect endangered species

b.

preserve trees for timber

c.

permit hunting activities

d.

provide income for the government

a.

xylem

b.

phloem

c.

cambium

d.

cortex

a.

Tropical woodland

b.

Desert

c.

Temperate forest

d.

Tropical rainforest

a.

nitrogen(iv)oxide

b.

ozone

c.

fluorine

d.

carbon(iv)oxide