Grammar portion
use this and that who those
_is he standing at the bus stop​

who

Explanation:

as the answers will be who because the sentence is _ is he standing at the bus stop so ot suits to who

Who is he standing at the bus stop?

Explanation:

You can't use "this", "that" or "those" cause the context is more of a question to a direct sentence.

so "who" is the correct and most appropriate word to use in that context or sentence

I believe that sentence as a question mark "?" which you forgot to put right there.

pandas are endangered because of habitat destruction by humans.

as of 2014 there were around 2,000 left, since then, it supposedly has risen 17%.

they are a very endangered species.

-theoneandonly003

the underline word is basically like a prepositional phrase.