Answer:
Difficulty
Explanation:
Space exploration was the last thing the world could have thought of dabbing into because the idea of moving away from the earth and flying in the sky wasn't even an easy one for man, hence the difficulty attached with going into other planets was a big success.
Many trials were made before the eventual success experienced, this many difficulties man overcame is what is meant by barrier in this sense.
Answer:When you're assigned a literary essay in class, your teacher will often provide you with a list of writing prompts. ... Maybe the main character acts one way around his family and a completely different way around his ...
Explanation:When you're assigned a literary essay in class, your teacher will often provide you with a list of writing prompts. ... Maybe the main character acts one way around his family and a completely different way around his ...
I don’t know this one as I have never heard of his
