In which direction do the gravitational forces act between you and earth

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )