Theres 3 types of climates there arid, semiarid and temperate
True if it is a true or false question
I would say that the resource you could use to find the meaning of <em>ambiguous </em>is the dictionary.
An almanac is an annual publication about weather, crops, etc.
A thesaurus is a dictionary of synonyms.
An encyclopedia is self-explanatory.
Increased productivity is the main contributor to economic growth in U.S. agriculture.