Metamorphism can be caused by increased temperatures. How can ...

[Caiter2013]

Metamorphism can be caused by increased temperatures. How can temperatures be raised,
  geologically, to bring about metamorphism? What will be an ideal response?

Question 2

How can fluid activity promote metamorphism? What will be an ideal response?

[elyse44]

Answer to Question 1

Possibilities include burial, igneous activity (intrusion, etc.), and friction (deformation).

Answer to Question 2

Fluid activity promotes metamorphism by increasing the rates of chemical reactions by carrying ions
in solution

[Caiter2013]

Excellent

[Liamb2179]

Thanks for the timely response, appreciate it