Question

The original cells of petrified wood have been replaced by:

iron
minerals
new wood
water

Answer 1

Some of the best specimens of petrified wood have been preserved by silicification. Two forms of silicification are common. The most abundant is wood that has been replaced and infilled by chalcedony (sometimes called "agatized wood").

hope I helped :-)

Step-by-step explanation:

Answer 2

Answer: That guy was correct but the short answer and more understandable is minerals.

Explanation: their cells are replaced by minerals and rock making it harder. It is not Iron, new wood, nor water. hope this helps :-)