Solution: NOTE: This puzzle requires reference to a particular other website in order to solve. If that website ever goes down or changes significantly, then this puzzle will become unsolvable.

Ok, now on to the solution. First thing to do is solve the cryptogram. You should be able to solve almost all of it just from the information given:

How far can you dig?
What is your favorite thing to do?
Is it true you have _ hearts?
Do you like the sun?
Do you feed it?
What kinds of worms are in the soil?

The blank in the third question is a 5, but the only real way to find that out is to do a little Google searching to locate the source of these particular (and strange) questions. They are taken from a particular website about earthworms: here.

As the puzzle's title -- Q & A -- suggests, locate the six questions on the website and find the coresponding answers. The 6 answers are:

As far as it takes to find food or until I hit something too hard...
Eat!
Really five pairs - if you'd call our blood pumping system hearts.
A little bit goes a long way. I know it helps grow the things...
That is one reason we don't have a dog. Few pets want to eat...
Earthworms. There are said to be 9,000 species of annelida...

Reading the first letters of the 6 answers gives the answer to "what i do" and the solution to this puzzle: AERATE.