IB ESS HL 3.2.1 Threats to Biodiversity Questions

a. They require both aquatic and terrestrial habitats/specialised niches so more likely to be affected by habitat loss/limitations;
b. They have permeable/soft skin more vulnerable to disease/UV/pollution;
c. Few amphibians have great public/charismatic appeal attracting protection/conservation efforts;
d. They generally have very limited parental care so offspring more vulnerable / high mortality rate in offspring;
e. They often depend on small bodies of water that are particularly vulnerable to drought/global warming/human development of wetlands

Note: Only credit marks that are explicitly related to the vulnerability of amphibians. General factors such as habitat destruction, hunting or climate change alone are TV.

corals ...
a. are sedentary/cannot migrate (to avoid pollution or other risks);
b. are r-selected species so high mortality rates (in planktonic phase);
c. (have delicate symbiotic relationship) highly sensitive to small changes in abiotic conditions;
d. are impacted worldwide through ocean acidification (causing bleaching);
e. are impacted worldwide by global warming/climate change /warmer waters (causing bleaching);
f. inhabit areas with high human polluting activity such as urban waste/agricultural run-off/oil spills/aquaculture;
g. have value as souvenirs/trophy/collectors' items;
h. are fragile/easily damaged unintentionally (by boats/nets/storms etc);
i. have very slow growth rates (in sedentary phase);
j. have limited ranges/ocean depths/habitats where they can live;

Credit any response that is consistent with the increasing trend of extinction in corals.
Do not credit "pollution" alone there must be reference to a relevant source of pollutant as in MPf