TV seems to be a threatening item for communication of households
TV has become a serious threat to family bonds because it affects adversely on communication between family members.Some people claimedclaim that family members prefer spending time on watching TV to interacting with each other.
... claimed is past tense and hence it is not the right form of tense. This line should be kept at present tense.
You need to work on grammar a bit. Also, do not use keywords when you are not sure of their usage. They might have a very different meaning. For example;
The main reason why I dispose the danger of TV for communication in a family is because usually family members watch TV when they are eating dinner.
Here, the word dispose is not the appropriate usage. Instead, you should have used a word like "believe".