Which is an example of a physical change?

(a) wood rots
(b) a nail rusts
(c) gasoline ignites
(d) water evaporates

answer; i believe the correct answer is (replication is not conservative);

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this