The most distinctive xylem cells are the long tracheary elements that transport water<span>. </span>Tracheids and vessel elements are distinguished by their shape<span>; </span>vessel elements are shorter, and are connected together into long tubes that are called vessels<span>. </span>Xylem<span> also contains two other </span>cell<span> types: parenchyma and fibers.</span>
Answer:
habituation
Explanation:
Habituation is a kind of learning process in psychology, which describes the behavioral responsiveness of humans and animals to a stimulus that is presented repeatedly without a change, punishment or reward. It explains that response of humans and animals to a stimulus that is repeatedly presented will reduce over time. The more the repetition, the less response is exhibited.
Hannah is simply exhibiting a lesser degree of responsiveness to the repeated occurrence of same stimuli which is termed habituation.
