The main reason that most farmers use stem cuttings rather than just planting a seed is that a tree's genetic variation will occur. The seeds of many fruit trees tend to vary differently from the parent, because seeds themselves are produced by sexual reproduction (i.e they receive genes from a male and female to form). As they are a cross from two sets of genes, many fruit trees are not “true to seed”. Their seeds will produce a generally different variety of tree from the parent. When using stem cuttings, it's almost like a cloning process.
It will ultimately affect every branch of the food chain, as protists are the basis of it all.
Continental-volcanic is NOT a convergent boundary. The answer to your question is B. I hope this is the answer that you are looking for and it comes to your help.
Differences in air pressure at Earth's surface are caused by unequal heating of Earth. Warm air masses are less dense and have lower air pressure than cold air masses.