'If' acts as the subordinate conjunction, in that it reduces the importance of the first main clause "I will try this new food", and increase the importance of the subordinate clause, "if you will". The subordinate clause "if" also provides the smooth transition between ideas.
I would say that this is right. If the person decided to send their money to a person who needed it then that alone is a wonderful thing to do. As for the fact that the sender did not include his/her name, they might not want recognition or praise for their actions. Many people decide to donate anonymously because they want to help the cause without getting involved personally.
Hope this helps!
The theme is that one should prioritize work before leisure. The ants did this and prepared for the winter, while the grasshopper did not and started having troubles because of this.
