Which of these statements is true? A. Species do not interact with each other in the course of succession.
B. During succession, new species move into an area and colonize it, and are later replaced by newer species.
C. Most ecological successions occur over 10 to 15 years.

Opt B is the right ansig this is according to the charles darwins theory...survival of fittest

b) chemical ( the chemical breakdown of food is accomplished by enzymes. )

- officialprodixy ☕

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers