I believe this an example of complex sentence structure.
My reasoning is that most of these sentences are in fact compound complex sentences-
Compound-complex sentences contain two independent clauses and at least one dependent clause.
An example of a complex sentence is this: “I burned dinner but not the cake.”
I would say the answer would be “in”
I say false because I just feel like it is you don't have to go with it though
Coronavirus vaccine I helps u from not getting the corona
