that's right . i used to have a teacher teaching me spanish and she said "b" in spanish is often pronounced with a mixture of "v" . it is something just between. yes i think the pronounciation in duolingo is a bit strange. i tried learning english just for fun and its pronunciation was not quite satisfying
Because you're learning tenses later on, this is more basic. You will learn tense conjugations later. Each action verb changes based on tense and (sometimes) the gender of the subject. "I eat (Yo como)" is easier to learn verses present tense "I am eating (Yo comiendo)". The harder stuff comes later. You have to learn the proper usage of the basic words before the conjugated versions.
There is only one subject in this sentence. Typically in statements (there are exceptions) the subject is stated before the verb, so you conjugate the verb according to that, which would be "él" in this sentence. "Pollo" is the object in this sentence, not the subject. The object is what is receiving the action, it answers the question "what/who", it typically goes after the verb in English. In this sentence it would be like saying "He eats (what?)" The answer to the "what" would be chicken, therefore that is the direct object of the sentence. Hope that helped! It's a bit confusing, it takes time to get used to learning the different parts of a sentence.
Duolingo doesn't always accept present progressive "he is eating" as a translation for simple present tense "he eats".
Sometimes they mean the same thing: "He works on Thursday nights" is pretty much the same thing as "He is working on Thursday nights". Sometimes they are different: "He eats fish (in general)" is not necessarily the same thing as "He is eating fish (right now)".
It is usually smartest to stick with the closest translation. If Duo says "Él come" then translate it as "He eats". If Duo says "Él está comiendo" then translate it as "He is eating".
French doesn't have a present progressive tense like English and Spanish do; it uses the regular present tense. In French you can say "Il est en train de..." to emphasize the current ongoing nature of an action.