Using article 'The' in Noun + Prep + Noun pattern

I have a doubt of using the article (the) in the following context. Please tell me which version of the following two sentences is correct?.

    1. A child pulled out **the** grass in the park near my home. [the grass]
    2. A child pulled out grass in the park near my home. [grass]

Answer

Both are fully grammatical.

The second refers to some unspecified grass in the part that the child pulled, while the first indicates either all the grass in the park, or some particular grass that the hearer is expected to know.