I believe it's A. Premature Birth (though they all seem pretty believable)
Answer:
im so sorry this is so late but i hope i can still help.... its the 3rd one
Explanation:
Answer:
Chemical engineering
Explanation: I am not really that good at science but my opinion is that it is chemical engineering because the process of the rock breaking down with the listed factors of water, carbon dioxide etc. If you are not sure you can also look of the definition for each of the engineering factors...
Answer:
Bacteria that entered an organism body can cause mutations by altering the gene