The phrase that best describes what type of sentence this is, is option C. Prepositional phrase modifying another prepositional phrase. The prepositional phrase "on the beach" is modified by another prepositional phrase which is "by the sea". These are prepositional phrases because of the prepositions "on" and "by", used in these phrases.
All What
All what makes more sense than all that
As the 20th century progressed, the laws of science were increasingly considered to be mysterious and questionable. Option D is correct.
Science advanced dramatically during the 20th century. New and radical developments in the physical, life and human sciences existed. Besides, a great amount of new technologies were developed in the 20th century. Moreover, some technology innovation created in the nineteenth century were perfected in the 20th century.
It's basically just saying to appreciate everything you have in life, whether you have a lot or a little. It also says that objects don't make happiness.