6. Strawberries are expensive. I don't often buy them.

which of this words fits in sentence although, because, since and when

Since

Explanation:

I don't often buy strawberries since they are expensive.

The sentence would also make sense like this:

Since strawberries are expensive, I don't often buy them.

OR

I don't often buy strawberries because they are expensive.

because of all the immigration, america became one big melting pot. the diversity of cultures from all over the world made america somewhat divided as well. people that immigrated stayed with their kind, and their traditions, while native born americans stayed with their kind and their traditions. normally, people born in american scorned the immigrants as well. the new religions also divided america. in summary, it took away from the american culture and identified america as the "melting pot."

usually, a falcon can kill an owl, and horses don't normally eat each other.