Final answer:
Natalie can file as a head of household because she maintains a home for herself and her two dependent children, and her husband has abandoned her without communication since early June of 2019.
Step-by-step explanation:
The correct statement regarding Natalie's filing status in 2019 is that she can file as a head of household. Since Chad abandoned her and she has had no communication with him since early June of 2019, she is not eligible to file a joint return with him. Additionally, filing as a surviving spouse is not applicable because Chad is not deceased. Filing as a head of household is appropriate because she maintains a home in which her two dependent children live. This status provides better tax rates than filing as single and offers more tax benefits compared to other filing statuses under her circumstances.