Social and personality development in infancy and early childhood

Please answer three questions;
Notes: This course is all about human development and early childhood education. This course is opened for future educators, so the answer should be written from educator's perspectives.
First question:
Using the research shared in the textbook, do you believe that parents who are having difficulty in their relationship should stay married (as opposed to separation or divorce) for the sake of their children? Why or why not? Are there conditions under which co-habitation or staying together is more preferable than separation? What do you think are the implications of parents' decision to stay together "for the sake of the children" versus those who amicably separate?
*I uploaded the screenshot of textbook content that related to this question. Please make a CLOSE CONNECTION to the content that I uploaded.
The citation for the textbook:
Lifespan Development, 7th Canadian Edition by Boyd, D., Johnson, P., & Bee, H. (2020), REVEL Version (electronic)
No additional resources is needed.
Second question
How do you think sexual education curricula can or should tackle gender identity and sexual identity development in the context of a changing landscape (academic, social, and political) around biological sex, gender, and their relation to one another?
Maximum one additional resources can be used.
Third quest:
Insecure attachment between children and caregivers(Parents) can be found to be perpetuated from generation to generation. Why might this be? What could be done to break this cycle? What kind of external interventions might be required?
No additional resources is needed.
All of above questions requires not only make connection to the textbook screenshots that I uploaded, but also respond question more thoughts beyond the textbook content, such as personal thoughts, or paraphrase from additional resources.
Thank you and stay safe, let me know if you have any questions.