- Registration time
- Last login
- Online time
- 6 Hour
- Reading permission
(This is another good posted question...)|
There is a reason why the question posted here causes some confusion, because its intent is to help you learn. English test questions such as this one are meant to have you look in the dictionary and understand the meaning of specific words and their usage that could seem similar to each other. I will provide a summary of definitions (as a noun) examples...
reward = something given or received
award = something awarded, as a payment or medal
prize = something that is won
result = something that happens as a consequence; outcome
In our posted sentence, the important part that points us to the correct answer is "acts lead to". Lets look up the word "act"...
act = to produce an effect or outcome
In English we often use the term "cause and effect". An "effect" is a consequence, or result from a cause, or act (action).
So yes, you could use the word "reward". In psychology circles this word is often used as "positive feedback". However, in our posted question, there is no mention of "positive feedback".
And now lets look up the word usage of "certain"
certain = definite or particular, but not named or specified
The use of the word "certain" might make you think maybe they are talking about positive feedback, but I think the intent is from the babies point of view, such as if he make a noise that sounds like "mama", the mother will respond and not the father.
In this case, the "certain act" of saying "mama" will result in the mother responding, which we assume that is the intent of the baby's' desire. If it wanted the father, he changes his "certain act" to "baba" and the result is the father responds.