Q: What is the process of oxidized iron that has been exposed to air and water? Read this paragraph and choose the correct option from the provided answers: After the ball of cells reaches the uterus, it fixes itself to the side of the uterus. This is called implantation . It usually happens about a week after fertilization. Now the implanted ball of cells is ready to continue its development into a baby boy or girl. Choices: - bark - crust - crystallization - rust A:
rust