Study Figure 4b, which displays coastal management strategies and their estimated costs.
| Coastal management strategy | Estimated cost per 100m |
|---|---|
| Rock armour (rip-rap) | £300,000 |
| Sand dune rejuvenation | £20,000 |
| Recurved concrete sea wall | £1,000,000 |
| Beach reprofiling | £50,000 |
| Timber groynes | £150,000 |
Using Figure 4b, give an example of:
A hard engineering strategy
A soft engineering strategy
