Question

select the scientific process skill(s) which helped robert hooke discover plant cells in the tissue of a cork oak tree. experimenting observing questioning communicating

Explanation:

Robert Hooke used a microscope to look at the cork - oak tree tissue. By visually examining it, he saw the structures that he named cells. This was mainly an act of observing. There is no indication in his discovery of plant cells in cork that he was experimenting (conducting tests with variables), questioning (posing specific questions that led to the discovery), or communicating (sharing the discovery at that moment of discovery).

Answer:

B. observing