Mutations . add new genes to a gene pool
are always harmful
give organisms what they need to survive
are never beneficial to survival

add new genes to a gene pool

I think there will be about three correct answers from the list of choices above. Mutations are random, can be beneficial depending on the environment and that it add new genes to the gene pool.

Explanation:

i guess it’s a and b

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards