In new york state, cars are inspected to be sure
they are not releasing excessive amounts of
several gases into the atmosphere. this is done
in an effort to
(1) recycle more nutrients
(2) reduce biodiversity
(3) reduce global warming
(4) increase the growth rates of forests

the correct option is option d

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.