B. It encouraged exploration for a new trade route
There will be 6 left. Take 1000 divided by 7 you get 142 and some Numbers. Then 142 time 7 which gives you 994. That's how many you gave out. 1000 - 994 equals 6 that is left over.
Cliff collapse can cause land with houses, schools or places of work to be severely damaged or destroyed, this can result in people having to relocate which can cause express and sentimental distress (the impact of this is often greater on the elderly or families). Businesses that have been damaged / destroyed may have to close or make some people redundant if the economic impact on them was high; this has a large economic affect on the individual and any people dependent on them (e.g. Children / elderly parents) but this will also affect the entire community as there will be drops in the local economy which creates a multiplier affect.
Often coastal areas are tourism honeypot sites, if the cliff collapse causes lots of the sites tourists are interested in to be destroyed (e.g tourism shops, caravan sites) then lots of people employed in tourism may be may redundant, this has a wider affect than you may think (e.g. businesses that support this tourism such as companies that make scuba diving kit, dairies which provide milk for I've creams etc).
The definition of a free trade is the international trade left to its natural course without tariffs, quotas, or other restrictions. Which means that if there are no restrictions in the imports and exports more countries would be able to import or export different types of goods all over the world.
