a plant is a kind of living thing & grass is a kind of green plant ->  grass is a kind of living thing  a cow is a kind of animal & an animal is a kind of living thing ->  a cow is a kind of living thing  grass is a kind of living thing & a cow is a kind of living thing ->  grass and a cow are both living things  all living things grow & the ability to grow is a kind of trait ->  all living things have the ability to grow  grass and a cow are both living things & all living things have the ability to grow -> grass and a cow both have the ability to grow