I personally think that it's C because all others r present......even D......because plants like climbers do curl around a tree trunk !!!
In an experiment the HYPOTHESIS is tested. The hypothesis is the assumption, that you make about something. Example would be, you believe (hypothesize) that the baking soda will react faster in vinegar than in water. You then test it out (or preform and experiment) to see if your hypothesis is correct or wrong.
A stem is what keeps the plant together and supports their leaves
B. STEMS
Tentative means possible
So a possible explanation of any matter on whuch you are working will be called astentative explanation which may be correct or incorrect
If you conduct experiments and get consistent results and then change variables and again get consisnet results.
