There are many of them but the most common are:
1.) Photosynthesis
2.) Solar Energy
3.)Thermochemical Reactions
Answer:
I believe the answer is: Unfamiliar weather and soil conditions affected cultivation.
Explanation:
The unfamiliarity make the colonists need a lot of time to adjust their agricultural farming process (which resulted in several years of failures). After living on this region for some time, the colonists able to understand the type of crops that could grow in their territory and the cultivation technique that they could use to sustain the operation.
Cake :) XD I think it was her...
3) claims sovereignty over the same land
