Final answer:
The wires are joined together with solder to ensure a secure and reliable electrical connection. Soldering helps prevent loose connections, reduces resistance, and protects the wires from oxidation and corrosion.
Step-by-step explanation:
The wires are joined together with solder to ensure a secure and reliable electrical connection. Solder is a metal alloy that melts at a lower temperature and can bond the wires together when heated. It creates a strong and conductive connection that allows electricity to flow freely between the wires. Soldering is commonly used in electronics and electrical applications, such as circuit boards, wiring, and connections. It helps prevent loose connections, reduces resistance, and minimizes the risk of electrical failures or fires. Additionally, soldering also helps protect the wires from oxidation, corrosion, and other environmental factors that can deteriorate the connection over time.