When calculating purchasing power parity, what is being compared?

money needed to buy an item in different currencies
the number of imports and exports within one country
prices on the market for all goods and services available
total goods and services produced between two nations

Read the excerpt below and answer the question. and i live on, but in grief and self-contempt, left here without the light i loved so much, in a great tempest and with shrouds unkempt. no more love songs, then, i have done with such; my old skill now runs thin at each attempt, and tears are heard within the harp i touch. (lines 9-14) which of the lines, taken from the sestet shown above, is the volta?

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

What lured the spanish to the area of oklahoma?