It is a parasitic relationship, where parasite is benefitted and the host if harmed. Example of this includes, tapeworm which attaches themselves onto the intestine of the animals like pig, cow wtc, and use their undigested food, and cause nutrition deprivation in them.
What materials were used to build the Golden Gate Bridge? The main materials used to make the Golden Gate Bridge were 75,293,000 kg of steel; two main cables, each made of 27,572 strands of wire; 600,000 rivets in each of the towers; â¦ and concrete. The steel was made in New Jersey, Maryland and Pennsylvania and shipped through the Panama Canal. 126 people found this useful.
The very large cables used in suspension bridges are often woven in place. Each of the two cables from which the deck of San Francisco's Golden Gate Bridge is hung contains 27,450 wires, made up into 61 strands of 450 wires each. The cable is more than a yard in diameter and weighs 7,125 tons.