Is there anything you need help with for this problem? I need to clarify first before answering your question.
Answer:
A
Explanation:
this is because, in smaller organism their SA/V ratio is large hence they have efficient transport of materials within their cells
A group of similar (accoding to function) types of cells, when comes together to perform a specific function, then it forms a tissues.
When a group of similarly working tissues come together then they form an organ.
And this relation could be written as
cell > tissue > organ
So, organ is a collection of tissues and tissues are collection of cells.
So your answer seems like it is false
Low pressure- Where the air pressure is below average
High pressure- Where the air pressure is above average