Is it important to bring water to drink during vigorous excercize?
a. true
b. false

The answer to your question is True you need water so you will not become dehydrated while doing the various exercises. 

This answer is true because exercise makes you really tired and dehydrated and drinking water can give you more energy cuz it hydrates yoy

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.