3 7 and 4 also 5 it makes sense
'Horse Drawn Vehicles' were once the primary transportation method, and there were 3 involved animals, horses, mules, and oxen, although horses were the original go to for a carriage, due to fast movement, oxen soon became popular amoungst emigrants.
Not work as the water from the oceans wouldn't heat and evaporate
If Jen can remember the first and last three items when she gets there, but she is unable to remember the four in the middle, this U-shaped pattern of recall is called the serial position effect.