Which one of the following is the most inclusive category? a) ecotone. b) landscape. c) ecosystem d) biotic community

C) ecosystem

Explanation:

Ecosystem is a biotic community where living things such as plants, animals, humans, birds, insects and others interact with the non-living components of the environment. An ecotone is the transition zone between the two biomes. It is the zone where the two communities meet. Thus this can be a part of the ecosystem. A landscape is the abiotic factor which also be the part of the ecosystem.

9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

the answer is c. it will give up it's valence electron to the other atom.