Laura vividly remembers her high school graduation, an example of memory, but has forgotten the meaning of the term "photosynthesis," a failure of memory.

a. implicit; explicit
b. explicit; implicit
c. episodic; semantic
d. semantic; episodic

c. episodic; semantic                                                                                                  

Explanation:                

Episodic memory: In psychology, the term episodic memory is defined as a memory that is related to the autobiographical events including location geography, times, associated emotions, and knowledge that can be conjured or stated explicitly. It is responsible for collecting the personal experience of an individual's life at a specific place and time.

Semantic memory: In psychology, the term semantic memory is defined as a part of the long-term memory that is responsible for processing the concepts and ideas that can not be drawn based on personal experience.

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.