Why is life not meaningless according to henry david thoreau in walden?

One way that the novel differs from earlier literary works is that novelists often leave out many details associated with the setting novels only portray positive aspects of heroes and other important figures characters' personalities in novels are only revealed through dialogue readers are often able to relate better to the characters in novels

How does this image the reader to understand seismographs?

How can behavioral science be applied in improving public health? a. by tracking a disease to determine its sourceb. by creating promotions that improve health habitscboth by tracking a disease to determine its source and by creating promotions that improve health habitsd. neither by tracking a disease to determine its source or by creating promotions that improve health habits