Insects, and some other invertebrates, exchange oxygen and carbon dioxide between their tissues and the air<span> by a system of </span>air<span>-filled </span>tubes<span> called tracheae. Tracheae open to the outside through small holes called spiracles. In the</span>grasshopper<span>, the first and third segments of the thorax have a spiracle on each side.</span>
Answer:
Whom stopped to pay attention to the street performer?
Forming a compound subject
A compound subject refers to a sentence that talks about two or more subjects. The two subjects are combined with a conjunction such as (and, or, neither).
By forming a compound subject the two sentences:"snowshoeing is a popular activity in grand lake. snowmobiling is also a popular activity in grand lake" can be combined into one sentence as follows:
"Snowshoeing and snowmobiling are popular activities in grand land"
This new sentence now contains a compound subject (both snowshoeing and snowmobiling) which is separated by the conjunction "and".
