Answer: 2
Explanation: There's X (female) and Y (male).
Females have two X chromosomes while males have one X and one Y chromosome
Answer:
There are many types of matter because one thing or substance can change its structure depending on its environment such as how much pressure it's under and what kind of temperature surrounds it.
Answer:
i believe the answer is C: hospitalizations
Answer: it would block your airways to stop you from breathing
Explanation:
its easy just think if your noise was stuffy it would be hard to breath did a 6th grader really have to tell you that