Hi would anyone care to explain in detail what the highlighted sentence is talking about, especially the second part “hold fast to the right of ’s fortress”, you in advance ^o^

What "Hold fast to the right of private... self's fortress" I believe, means that in your own home ("fortress") you have the right to privacy. Hope That Helps!

the answer is d . a measurement   how can artists measure the width of the human face to use drawing for correct proportions

your answer would be d.)