Marine biologists are investigating the impact of rising sea temperatures on coral reefs. They hypothesize that coral species with lower thermal tolerance thresholds are at a greater ecological risk of local extinction. The table below shows the thermal tolerance threshold, measured as the sea surface temperature anomaly before severe bleaching occurs ( $TbleachT_{\text{bleach}}$ . in $∘C^{\circ}\text{C}$ ), and the projected regional survival outlook for six common Indo-Pacific coral species.

Coral Species	Thermal tolerance threshold ( $TbleachT_{\text{bleach}}$ . in $∘C^{\circ}\text{C}$ )	Regional survival outlook
Acropora hyacinthus	$1.10$	Critical
Pocillopora damicornis	$1.35$	Endangered
Stylophora pistillata	$1.60$	Vulnerable
Turbinaria mesenterina	$1.95$	Near threatened
Porites lutea	$2.15$	Vulnerable
Favia favus	$2.85$	Stable

Describe the evidence in the table that supports the hypothesis that a lower thermal tolerance threshold is associated with a more severe regional survival outlook.

Identify one piece of evidence from the table that does not support the hypothesis that a lower thermal tolerance threshold is directly correlated with a higher risk level.

Coral Species	Thermal tolerance threshold ( $TbleachT_{\text{bleach}}$ . in $∘C^{\circ}\text{C}$ )	Regional survival outlook
Acropora hyacinthus	$1.10$	Critical
Pocillopora damicornis	$1.35$	Endangered
Stylophora pistillata	$1.60$	Vulnerable
Turbinaria mesenterina	$1.95$	Near threatened
Porites lutea	$2.15$	Vulnerable
Favia favus	$2.85$	Stable

Describe the evidence in the table that supports the hypothesis that a lower thermal tolerance threshold is associated with a more severe regional survival outlook.

Identify one piece of evidence from the table that does not support the hypothesis that a lower thermal tolerance threshold is directly correlated with a higher risk level.

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