Respiratory System
Circulatory System
Digestive System<span />
Following gastrulation, the next major development in the embryo is neurulation, which occurs during weeks three and four after fertilization. This is a process in which the embryo develops structures that will eventually become the nervous system
Answer:
C. It changes the chemical composition of the air, soil, and water.
Explanation:
The most sensible explanation out of the choices given.
BRAINLIEST.
What is your name by the way?