To reserve something is to set aside
Ex: "I reserved that hotel room."
The best way to describe the sentence " In 1984, Byron Lichtenberg, who is a biomedical engineer became a member of a spacecraft crew." is complex. The correct answer is C, complex.
I am pretty sure the answer is D the bare oak tree because it is mentioned in both passages given
All of them except katrina helps her brother who is six years old with his homework is essential
