Problem: In European history when child labour was common, as well as in contemporary child labour of modern world, certain cultural beliefs have rationalised child labour and thereby encouraged it. Some view that work is good for the character-building and skill development of children. In many cultures, particular where the informal economy and small household businesses thrive, the cultural tradition is that children follow in their parents' footsteps; child labour then is a means to learn and practice that trade from a very early age. Similarly, in many cultures the education of girls is less valued or girls are simply not expected to need formal schooling, and these girls pushed into child labour such as providing domestic services.
For working parents what is the value of having their children work by their side?
The answer is the following: learn and practice that trade from a very early age

Problem: Avialans diversified into a wide variety of forms during the Cretaceous Period. Many groups retained primitive characteristics, such as clawed wings and teeth, though the latter were lost independently in a number of avialan groups, including modern birds (Aves). While the earliest forms, such as Archaeopteryx and Jeholornis, retained the long bony tails of their ancestors, the tails of more advanced avialans were shortened with the advent of the pygostyle bone in the group Pygostylia. In the late Cretaceous, around 95 million years ago, the ancestor of all modern birds also evolved a better sense of smell.
During which time period did avialans diversify into a wide variety of forms?
The answer is the following: Cretaceous Period

Problem: The consensus among linguists is that modern, standard Czech originated during the eighteenth century. By then the language had developed a literary tradition, and since then it has changed little; journals from that period have no substantial differences from modern standard Czech, and contemporary Czechs can understand them with little difficulty. Changes include the morphological shift of í to ej and é to í (although é survives for some uses) and the merging of í and the former ejí. Sometime before the eighteenth century, the Czech language abandoned a distinction between phonemic /l/ and /ʎ/ which survives in Slovak.
What did the Czech language abandon which survives in Slovak?
The answer is the following: a distinction between phonemic /l/ and /ʎ/

Problem: Agricultural protectionism—a rare exception to Switzerland's free trade policies—has contributed to high food prices. Product market liberalisation is lagging behind many EU countries according to the OECD. Nevertheless, domestic purchasing power is one of the best in the world. Apart from agriculture, economic and trade barriers between the European Union and Switzerland are minimal and Switzerland has free trade agreements worldwide. Switzerland is a member of the European Free Trade Association (EFTA).
What is Switzerland's world ranking in domestic purchasing power?
The answer is the following:
one of the best