The subject would be "A gorilla family", the predicate would be "ate all of the nuts and berries", and "ate" would be the verb.
The subject of a clause goes in one slot, the verb in another, and so on. Words that modify another word are attached to the word they modify.
I would say that how you can tell if your speech is written clear and concise is by making sure your words aren’t misspelled, you use your grammar properly, you don’t go off topic, getting to the point of what you are taking about in a short manner and then going on to explain, make sure your audience can understand the point you are making easily, and chose wise words, get rid “that” and “there is.” Hope this helps..