A keystone species is one that A. Eats a mixture of plants and animals. B. Is introduced into a community after a major disturbance. C. Causes the amount of diversity in a community to decrease. D. Helps to stabilize the populations of other species in the community

A keystone species is a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.

Explanation:

the answer is:  

he is voicing feelings shared by all humans regardless of race.

in paul laurence dunbar's poem "we wear the mask," he replicates the words mask and we to emphasize how people in general -not just black americans- hide their true feelings. he suggests the masks cover people's faces and eyes, which are the main parts that display their emotions. he also thinks people's pain conceal behind those masks, so that they cannot see reality and nobody is able to see one another's sorrow.

reescriba la oración completa para incluir la forma posesiva de "declaración de derechos" en la oración a continuación.

la declaración de la declaración de derechos de que "todos los hombres son creados iguales" se aplica a todos.