The important thing to watch out for grammatical error, among others, is the use of the subject-verb agreement. A singular subject must use a singular verb. A plural subject must use a plural verb. Let's investigate each sentence.
<span>"It is very important to train your dog": 'It' and 'is' are singular. Correct.
</span><span>"It keeps your dog’s mind active, and it help to build an understanding between you and your dog.": 'It' is singular and the verb 'keeps' is also singular. That is correct. But the other clause of the sentence must have a mistake. It should be 'it helps', not 'it help'.
</span><span>"Often owners will shout at their dogs or even punish them when what is needed is effective training": 'Owners' is plural so it is correct to pair it with 'shout' and 'punish'.
Explanation: This service announcement is directed towards kids. It's trying to encourage and motivate them to conserve energy. You can also use the process of elimination to cross out "aggressive" and "angry." It's not showing any strong emotions either, so it's not emotional.