I would say , to start thinking why they mean the most to you.
The correct answer is D, personification.
Personification involves giving human qualities to inanimate objects. In this sentence, the water "beckoned." To beckon means to gesture to someone to come closer -- a distinctly human action.
Therefore, this sentence uses personification to give water a human quality.
"Ask and it will be given to you; seek and you will find; knock and the door will be opened to you." Matthew 7:7
A complex sentence has a main clause and a dependant or subordinate clause right after, joining the two is subordinate conjunction.
Example:
You should always contribute to society since it will improve the lives of many people.
(You should always contribute to society) main clause.
(Since) subordinate clause
(Since it will improve the lives of many people)
dependent clause
Hope it helped. :D