Ariver most likely flows into the lake nearest to location

1.

a
2.

b
3.

c
4.

d

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3