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1
matching 3 points
there are a few different hypotheses as to why hominins evolved. match the hypothesis with its def
savannah hypothesis
turnover pulse hypothesis
variability selection hypothesis
this hypothesis states that the expansion of the
savannah forced early hominins from arboreal
lifestyle to a terrestrial one where bipedalism was
more efficient.
this hypothesis states that the evolution of
hominins is linked to the long - term climatic
variability and environmental instability, pushing
them to evolve traits for surviving shifting
environments.
this hypothesis states that periods of extreme
climate change are associated with the extinction of
many species with subsequent diversification and
migration to fill now empty ecological niches.

Explanation:

• Savannah Hypothesis: The first description mentions the expansion of the savannah forcing early hominins from an arboreal (tree - dwelling) lifestyle to a terrestrial (land - dwelling) one where bipedalism was more efficient. This directly relates to the Savannah Hypothesis as it focuses on the environmental change (savannah expansion) and its impact on hominin lifestyle.
• Turnover Pulse Hypothesis: The third description states that periods of extreme climate change are associated with the extinction of many species with subsequent diversification and migration to fill now - empty ecological niches. The Turnover Pulse Hypothesis is about how environmental (climate) changes lead to species turnover (extinction and new species filling niches).
• Variability Selection Hypothesis: The second description (in the blue box) says that the evolution of hominins is linked to long - term climatic variability and environmental instability, pushing them to evolve traits for surviving shifting environments. This is the core of the Variability Selection Hypothesis which emphasizes the role of long - term environmental variability in hominin evolution.

Answer:

Savannah Hypothesis: This hypothesis states that the expansion of the savannah forced early hominins from arboreal lifestyle to a terrestrial one where bipedalism was more efficient.
Turnover Pulse Hypothesis: This hypothesis states that periods of extreme climate change are associated with the extinction of many species with subsequent diversification and migration to fill now empty ecological niches.
Variability Selection Hypothesis: This hypothesis states that the evolution of hominins is linked to the long - term climatic variability and environmental instability, pushing them to evolve traits for surviving shifting environments.