Scientists believe that if a large spacecraft is placed near an asteroid, the generated by the spacecraft’s mass could change the path of the asteroid. A- force
B- gravity
C- energy
D- momentum
HELP PLZZ

Hich of the following best summarizes the text’s depiction of the ancient indus valley cities (namely harappa and mohenjo-daro)? a. the cities were very plain and simple; the people did not focus on art and architecture, devoting their time instead to agriculture and the bare essentials. b. the cities were adorned, or decorated, with almost overwhelming displays of wealth and artistic architecture. c. the cities were extremely clean, relying on an advanced water and sewer system, though this was mainly constructed for the innermost areas of the cities. d. the cities were clean and peaceful, and they were designed in an extremely organized fashion, using an advanced water and sewer system to keep them this way

Can someone list any possible solutions to air pollution ?

These factors threaten north americas ecosystems