What are the motivations for heating the metal to above the recrystallization temperature before working to shape it?

During the lab last week, the biggest challenge to metal casting experienced by most teams is:

Match the correct description for the following processes respectively:

Match the following processes in the right order/sequence for Investment Casting

Which of the two processes were used in making the component shown in the image below as described in the recorded lecture?

In an automated shell moulding process, it is not possible to add a core.

Which of the following is a good reason to opt for Die Casting if the thickness of the product is kept thin (to a few mm)?