Each passage has 10 errors in it. they are either errors in grammar (which does include spelling in this case) or punctuation. read through the passage and correct the errors.
make sure you highlighted the changes you made in some way (bold, italic, underline, different colors, etc.)
passage 1
despite all of the tiger’s strengths, the future of the species is uncertain. tigers face a very high risk of exteenction. it is estimated that at the start of the 20th century, there were over 100,000 tigers living in the wilde. by the turn of the century, the number of tigers outside of captivity dwindled to just over 3,000. interestingly, the most serious threats that tiger's face come from a much smaller species, one with an average weight of around 140 lbs. that species is homo sapiens, better known as humans. humans threaten tigers in primarily two ways: hunting and destroying habitat.
tigers are hunted for many reasons. people have long valyoued the famous striped skeins. though trading tiger skins is now illegal in most parts of the world, tiger pelts are worth around $10,000 on the black-market. though the fur would be incentive enough for most poachers, other parts of the tiger can also fetch a pretty penny. some people in chaina and other asian cultures believe that various tiger parts have healing properties. traditional chinese medicine calls for the use of tiger bones amongst other parts in some prescriptions.
passage 2
palaces are known for their beauty and splendor, but they offer little protection against attacks. it is easy to defend a fortress, but fortresses are not designed with the comfort of a king or gueen in mind. when it comes to struktures that are both majestic and well-fortified, the classic european castle is the pinnacle of design. across the ages castles changed developed and eventually fell out of use, but they still comannd the fascination of our culture.
castles were originally built in england by norman invaders in 1066. as william the conqueror advanced through england, he fortified key positions to secure the land he had taken. the castles he built allowed the norman lords to retreet to safety when threatened by english rebellion. castles also served as bases of operation for ofensive attacks. troops were summoned to, organized around, and deployed from castles; in this way castles served both offensive and defensive roles in military operations.