What inference can be made about the availability of food, based on this passage? there was plenty of food in elizabethan england. there was never enough food in elizabethan england. the winter months produced less food. the summer months produced less food?

The answer is: the winter months produced less food. 

The word "storage of food is most important" that start the passage telling that storing food in ideal condition is important.
The word "a valuable source of protein in the long winter season" signifies the need to keep the food in a long time. The reason why you need to store food for the winter season is that the land produces less food than demand, so you need to supply it from storage

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.