Answer:
Tense.
Explanation:
A tense is a grammatical indication of when a verb happens/ occurs. It categorizes the time, the duration, the completeness, or the continuation of any act that is done.
In grammar, there are three primary categories of tenses- past tense, present tense, and future tense. And according to what tense is used in a sentence, the time can easily be known or understood.
For example, the sentence "I went home late last night" is in the past tense as the tense form of "went" is the past tense of "go".
Similarly, "I will be going home" signifies a future tense as the sentence uses "will+be+-ing" form of the verb.
It is because there are certain weight limits that should be followed. When the EDS would exceed the specified limit, the aircraft will crash before it reaches its destination. This was taken from the science fiction called Cold Equation. Barton is a one of the EDS pilot. During his flight, he discovered there was a stowaway girl named Marilyn, hiding in the vessels area which eventually led to their demise.
The subject here is simple" it's just "Antarctica" .
The verb is also not compound, it's a simple verb: "has".
The compound part of the sentence is the object: it is: "a thick ice cover and the highest average elevation of all the continents"
so the correct answer is "compound subject"
