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 Mình nghĩ thay amount of tiger bằng a number of tigers thì đúng hơn vì amount dùng với danh từ ko đếm được

Tiger là count noun nên phải dùng "the tiger" chứ 

Thật ra là Tigers

bai viet hay va rat co y nghia.  chi la gop y ti thoi!

some method(s)

animal race / race of animal

reason (to) decrease

the parts of tiger are sold with hight price

(chung ta nen chu y cach dung dai tu: dung dai tu thay the cung loai so it / so nhieu )

Tigers are an endangered species, they may die out or become extinct so people should have some methods to protect a race animal them.

Now, amount(s) of them tigers is are decreasing (for) by economic purpose(s) and the destruction of humans. They Tigers (dùng they sẽ hiểu nhầm là humans) live in the wild. Tiger(s) has have been put on the list of extinction species. People hunt them to collect their bones, skin and other parts. This is a the reason why decrease  amounts of (tigers are decreasing). The parts of a tiger are sell sold with high price. Teeth, nails and other parts of a tiger are also used as charms, ornaments, jewelry. Eyes of a tiger also have lots of benefits. It helps makes you feel full of purposes, energy, self_ confidence and stress release stressful. It also helps their one's mind fell feel comfortable and have a good assessment. Tigers have lots of benefits so people want to protect them, it is a samemean with people also protect the wildlife. (câu này không hiểu ý bạn lắm).

The tiger is an endangered species. They may die out or become extinct so people should have some methods to protect a race animal the the race of this animal.

Now, amount of them the number of them is descreasing decrease by economic purpose and the destruction from of human. They live in the wilds. The tiger has been put on the list of endangered animals extinction species. People hunt them to collect their bones, skin and other parts. This is a reason for the decrease in the number of tigers decrease in the amount of tiger. Other parts of a tiger are sold with high price. Teeth, nails and other parts of the tiger are also used as charms, ornaments, jewelry. Eyes of tiger also have lots of benefits. It helps you have the purpose, energy, self_ confidence and release stress stressful. It also helps their one's mind feel fell comfortable and have a good assessment. Tigers have The tiger has lots of benefits so people want to protect them, it is also the same means for a samemean with people to protect the wildlife.

ý mình là hổ có rất nhiều lợi ích vì vậy con người hãy bảo vệ chúng, điều đó cũng đồng nghĩa với việc con người hãy bảo vệ thế giới hoang dã.

Vậy thì bạn chỉ cần viết đơn giản thế này nhé:

Tigers have lots of benefits. Therefore, to protect tigers is to protect the wildlife.