Are they dependents in Form 1040? Why?

Lorraine G. Smith / 119-00-7854 / DOB 05-01-1951 / Consultant Jeffrey L. Smith / 080-00-6598 / DOB 03-01-1949 / DOD 06-10-2021 / Retired 855 Mallabar Road, Palm Bay FL 32908 - Suzanne M. Smith / 114-00-0320 / DOB 05-01-2011 / Lorraine's disabled niece who lives with them and has no income / Lorraine \& Jeffrey provided 100% support. - William J. Smith / 087-00-4796 / DOB 05-01-2004 / Jeffrey's disabled adopted son who lives with them, has $91 in interest income from his savings account, and he earned \$4,292 in wages / Lorraine \& Jeffrey provided 51% support