(accidentally put it as biology) How does the author distinguish between picture engraving and letter engraving in the “Tools of Engraving” section?

by highlighting the impressive style and artistry of picture engravers as opposed to the simplistic and minimalistic style of letter engravers

by detailing the complex tools used in picture engraving as opposed to the basic tools used in letter engraving

by stressing the short apprenticeship lengths required for letter engraving as opposed to the extensive apprenticeship lengths required for picture engraving

by describing the firm guidelines letter engravers follow as opposed to the more interpretative techniques picture engravers follow

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Drag each label to the correct location in the equation. not all tiles will be used. the density of mercury is 13.6 grams per cubic centimeter. complete the steps for converting 13.6 g/cm3 to kg/m3. (1 kg = 1,000 g, 1 m3 = 106 cm3)

Natural resources are any materials that humans obtain from the earth to meet our wants and needs.