Diurnal animals are active a) only at night b) all day c) at dawn and dusk d) erratically

B. all day. I hope I helped! :-)

B) all day

Explanation:

Animals can be either diurnal or nocturnal depending on which period of they are fully active. Diurnal animals are those types of animals that are fully active during the day and sleep at night. This means they perform most of their day-to-day operations during the day e.g feeding. In the other hand, nocturnal animals are rather active at night and undergo rest during the day.

Example of diurnal animals are dogs, humans, deers, hawks etc. while examples of nocturnal animals are bats, owls, rats

1.the evidene of the reaction

2.yes

3.yes

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.