Showing that Sergei considers the goldfish to be his friend, there does not seem to be a conflict with the relationship between the two. And, yes. It can be called a friendship because any two living organisms can be friends if there wanted to.
Grandpa is lying in a hammock in the backyard.
B. lying - lie means to recline
lay - means to put down
Hope this helps.
Chronological order is the term.
J is the letter that comes next after G