Something is decaying if it is slowly rotting or otherwise degrading and breaking down.
A civilization that is declining may be said to be in decay, for example, "the decay of the Roman empire".
You disobey when you deliberately don't do what you are told.
The photo is of someone parking in front of a no parking sign, and some rubbish dumped in front of a no dumping sign.
The opposite of disobey is obey.
A dray is a strong cart or wagon used to carry heavy loads. It is a type of vehicle made for work, not for everyday travel by people. They were pulled by big, strong horses. Sometimes teams of four or more horses were used for particularly heavy loads.
The dray in the photo would have been used for moving barrels of beer, which are very heavy.
Gourmet describes exceptionally good food that requires a lot of skill and preparation to make. Fancy restuarants serve gourmet food.
