What isthe differnce between cohesion and adhesion?

Which of these is not an obstical to the future of space exploration? fundingresearch ideas technologytime

40. invasive species -. (2 points) olive in the area the species have always lived o naturally moved into a new area are brought to a new area by human activities do not affect the ecosystem of an area

Pls answer 42. 43. (i think i have 44. and 45. confused) 49. and 50.