Quite a few reasons. There are a few basic principles that define life. They are (I'm not sure this is all of them and there are exceptions) the ability to eat or otherwise gain energy (ie photosynthesis), the ability to produce waste, the ability to respond to stimuli, the ability to reproduce, and the ability to adapt to your environment (through natural selection/evolution).
Now its hard to say why its hard to define life. Take for example viruses. They gain energy, respond to stimuli, change, and produce waste. However they are unable to reproduce without the use of a living cell of another organism and therefore are considered nonliving. I also believe there was a sort of artificial life created, however since it reproduced using only rNA and not DNA it was not considered alive.
So as you can see these are just a couple of examples of why it is hard to define things as living or nonliving.
its all on how you look at it.. if it helps. talk to someone if ur upset.
that people need to goet a life and to get off of the computer
It is very difficult to live without plants.
Because there is little or none of it.
Chemistry plays a vital role in people's lives. All characteristics that define life are governed by the laws of chemistry. Without these chemical reactions, life will not be sustained.
because their is less feces
Happiness is difficult to define because each individual may feel different in what happiness means in their lives and some individuals are blind to the happiness they do experience. Without sadness or even some depression or general difficult times in ones life then they will never know what happiness truly is.
The term
define difficult
No snake is slimy. As to dry, that is difficult to define for an animal that spends its entire life in the water.
Philosophy is difficult to define because it encompasses a wide range of complex, abstract, and interconnected ideas about existence, knowledge, ethics, and reality. It can be challenging to capture all its aspects in a single definition due to its diversity and evolving nature across different philosophical traditions and perspectives.
reaction against
It's not
Reaction against
difficult to understand; enigmatic
The concept of organization is difficult to define because it means many different things. An organization can be a one person operation or it can be a company that has thousands of employees.
The physical characteristic of a place
Self-esteem is difficult to define because it is a complex psychological construct shaped by individual experiences, perceptions, and beliefs. It can vary greatly among individuals and is influenced by a range of factors such as upbringing, social environment, and personal achievements. Additionally, self-esteem is dynamic and can fluctuate over time.