172 official score already, taking again in August. Potentially interested

For question 22, JY says that the final sentence doesn't make sense and needs support. I disagree. Readers know that endangered species exist and it's logical to assume that if there are, for example, 1000 species of birds and 100 of them are endangered or threatened, and then the number of species suddenly jumps to 2000 or 3000, it is probable that one of the already endangered species has now been divided into 2 or more distinct species and that there are now more than 100 endangered species. Even if it is just 101, or 102 species. The sentence doesn't state that the number of birds needing protection will go up, or the amount of money needed to protect them will go up, only that the number of species needing protection will probably go up. It's not entirely relevant to getting the right answer, but I had a problem with the way JY hinges his explanation on the last sentence being illogical.