# Oyster Reefs as Natural Sea Defences: answers and explanations

Testmigo Practice Test 2, Reading Passage 2

Source: Written by Testmigo.

## Answer key

| Q | Answer | Proof |
| --- | --- | --- |
| 14 | G | wave energy behind them was actually 38.6 per cent higher |
| 15 | C | for lime production |
| 16 | A | it expects a third of American shorelines to be hardened by 2100 |
| 17 | D | this is close to the maximum recorded in laboratories |
| 18 | F | found 97 different species living in the cages |
| 19 | energy | they lose much of their energy before they reach the shore |
| 20 | spat | the young oysters are known as spat |
| 21 | cured shell | This cured shell is combined with engineered concrete |
| 22 | engineered concrete | combined with engineered concrete to form reef structures |
| 23 | 12.5 gallons | between 3 and 12.5 gallons |
| 24 | 1.78 billion | produced 1.78 billion baby oysters in 2016 |
| 25 | European eels | critically endangered European eels |
| 26 | oyster castles | monitored oyster castles |

## Why these answers are right

**14. G.** Paragraph G reports that when the oyster castles at Little Toms Cove were fully covered by water, wave energy behind them rose by 38.6 per cent. Higher wave energy behind a constructed reef is the reef making conditions worse.

**15. C.** Paragraph C says that in Australia oysters were dredged both for food and for lime production. Lime production is the non-food reason the statement asks for, so the information is in paragraph C.

**16. A.** Paragraph A says NOAA expects a third of American shorelines to be hardened by 2100. A future proportion of hardened coast is a prediction about hard structures, which places the information in paragraph A.

The why and the trap for questions 17 onwards are free with an account on the [answers page](https://testmigo.com/ielts/reading/oyster-reefs-as-natural-sea-defences/answers).

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