Great tense and smart movie, some answers are up to you for puroses

Rating: 8/10 (28 May 2018)

Most of the criticism towards this movie remains on the fact that it keeps you in the dark regarding many details about why the live how the live or what happened to the world so its in caos like that. The intention is clearly on purpose and very clever as it helps to create tension and mystery towards the plot making it a unconventional and interesting movie, something hard to achieve in this genre. People annoyed and mistaking this as inconsistency which I disagree. The top review lists some questions, I answer them all below:
1. They go to a waterfall where they can scream as loud as they want and the monsters can't hear them. Why not live there?
-The sound is mostly blocked when they are in a tine spot behind the waterfall, as it actually happens in real life. Besides, if there was no house there how could they build a house unable to make a sound?
2. When taking a walk, does anyone seriously let the youngest child of the group walk behind them? Why on earth would they let a young boy walk a hundred yards behind the adults in such a dangerous situation.
-They were in that situation for almost 3 months, its plausible that at one given moment, as walking on sand in a straight line they would fell somewhat safe or just neglect at that specific moment attention to the boy. The real reason is that the directors knows that it would makes us anxious and it is used for purposes creating tension.
3. How on earth did they get the corn planted? By hand? After 400+ days you wouldn't see corn in nice little neat rows like it was planted by farm equipment.
-They had electricity, its possible that they could have a electric machine to help prepare the land. Besides, how hard could it be to plant in a straight line.
4. Since the monsters can't hear you if there is a loud sound nearby, why not bring out one of the downstairs speakers and blast something 24/7 on one of the nearby trees or on top of the house? The monsters would get used to the sound and leave the area alone, leaving the family to talk in peace.
-Because this would be a very risky strategy as it would obviously attract even more monsters. Just like I would not drip a lot of blood to try to fend off sharks.
5. What human with a brain wouldn't consider making a soundproof room. They could go to the city, get a bunch of foam, blankets, pillows, whatever, and plaster it around one of the larger rooms until they created an effective sound barrier. In the movie, a single mattress pulled over a walkway is an effective sound shield. Imagine how effective they could be if they put some ACTUAL effort into soundproofing the room.
-How can you know its a safe trip to the city? How close is it? How many monsters are there? Cities are well populated areas with lots of sound that would likely atract more monsters. Its logical that they try to use ordinary available material to make their home more sound proof.
6. Apparently the monsters can be killed by shotguns? The entire military was wiped out, with all the weaponry of the finest military in the world rendered useless against the monsters, but Emily Blunt shoots one in the head and kills it? Right.
-They are bulletproof, except when they open themselves of their exterior natural armor.
7. The mother, Emily Blunt, is pregnant. Why would you bring a newborn child into this world, when the child will surely jeopardize the safety of the entire family. You know that babies cry right? Pull out or use a condom.
-This is easy, she could have gotten pregnant by accident, she could have wanted to get pregnant as a way to overcome the lost of her youngest child. She's a woman still having sex. That's all explanation you need...
8. If the monsters can hear the faintest sound from far way, why do they have trouble hearing sounds that even humans can decipher at close range. A baby crying, a mother's heavy breathing, a persons heartbeat. All of these things would be loud to a creature that hear can hear footstep from a half mile away.
-The creature could not hear a foot step from a mile way, but if you step on a stick or something that would make a clearly indistinct sound. AS for breathing and heartbeat, whenever the creature is shown close enough to them it in a small room with lots of stuff and even flooded so it is making a lot of sound itself. When the baby cried, it attracted the creature.
9. The mother's water breaks and she starts having the baby. She tries to contain her gasps and walks downstairs only to step on a nail on the stairway. She lets out a sound and falls, causing the monsters to hunt her down and nearly kill her and the newborn child. However, just in time, she is saved by fireworks designed to distract the monsters. Instead of removing the nail like any sane person, they just ignore it and leave it sticking up on the stairs for someone else to step on.
-The movies shows the moment that her dress puts the nail up. She does not note, after she steps on it, she is about to deliver her baby alone, there is no any sequence where she or anyone would have the time to do it.