I don't pick flower.
I don't pick grass.
I don't cut tree.
I don't throw any garbage anywhere.
I don't kill small animall.
I don't pick any branch.

Mary: I don't pick a tree.
Correct: I don't cut tree.
Explanation: You cannot pick tree. So, the right word should be cut.

Mary: I dn't throw any garbage anywhere.
Correct: I don't throw garbage anywhere.
Explanation:
a. be careful of your spelling.
b. No need to put any it's not necessary in your sentence.

Mary: I don't pick any branch.
Correct: I don't pick any branches.
Explanation: Remember, if you are using the word any the next word should be in plural form.

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Hello mary^^

Good job for your homework. Keep it up!

Love,

Teacher Mary :)