In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Q: Fact1: a seismometer is used to measure the strength or magnitude of an earthquake, Fact2: Earthquakes are measured on a scale of 1 to 10., Question: How do we grade earthquakes (A) Seisometers (B) Cladistics (C) feedback (D) Measuring the ground (E) Check out the sky (F) classified (G) Taking temperature (H) the Himalayas

A: A
****
Q: Fact1: Playing is one way mammals and other animals learn how to behave., Fact2: Opossums are a type of mammal called marsupials., Question: what plays to learn how to behave? (A) opossums (B) humans (C) people (D) fish (E) exercise (F) ants (G) h2o (H) catabolism

A: A
****
Q: Fact1: Vertebrates are all chordates that have a backbone., Fact2: Invertebrates are animals who lack a backbone or spinal column., Question: What do all vertebrates have that invertebrates don't? (A) sensory neurons (B) fur and fat (C) bones and joints (D) a jaw bone (E) kinetic energy (F) Chemical energy (G) a spinal column (H) a set of gills

A:
G
****