Organisms most likely evolved to respond to different photoperiods in which community

The answer is "temperate forest".

Temperate forests are those found in the direct atmospheres between the tropics and boreal areas in both the Northern and Southern Hemisphere. They may likewise be designated "four-season forests" in light of the fact that the midlatitude atmospheres harboring them tend to encounter four unmistakable seasons. A huge assorted variety of various backwoods composes make up this general classification, from the comprehensively appropriated calm deciduous timberlands to pine woods and moderately geologically limited mild rainforests.

  b.

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