The Spinning Jenny was:

a. A machine that used water power to create continuous, strong threads of yarn.
b. A machine that people used to make cotton into thread.
c. A machine with a mechanically driven needle for sewing or stitching cloth.
d. An invention that allowed weavers to weave faster and weave wider fabrics.

d

Explanation:

a machine for spinning with more than one spindle at a time, patented James Hargreaves' 'Spinning Jenny', the patent for which is shown here, would revolutionise the process of cotton spinning. The machine used eight spindles onto which the thread was spun, so by turning a single wheel, the operator could now spin eight threads at once.

explanation: j

it foreshadows the theme of the paragraph and hints the topic that will be discussed in the paragraph!