Introduce national heritage and write the 10 ways to preserve
do not copy from

A national heritage can be described as a site which is of importance to the people of a culture and government due to some historic events related to it.

There are many ways to preserve the National heritage of a country. Some of them are:

1. Get involved in conservation activities or activities which promote cultural heritage.

2. Certain chemicals now a days fight erosion and can be used to prevent erosion of these sites.

3. Offer tours so that the nationals of a country recognize the importance of the heritages and take steps to preserve them.

4. If a national heritage building is at the verge of being destroyed, then efforts can be made to renew the structure.

5. Conservation guidelines should be set up by the government to protect these heritages.

6.  Awareness programs should be set up so that the people know the worth of these places and avoid contaminating these places.

7. Is there is an event where we know that a historical place is close to being demolished, then a report should be submitted to organization's endangered list.

8. Establish survey resources from the past.

9. Prevent from scribbling on the walls.

10. Take care of the security of the sites.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail